Final Words on 2 Stroke vs 4 Stroke

Racer92
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10/21/2009 7:07am Edited Date/Time 10/21/2009 7:29am
Tiki wrote:
Two strokes are no harder or easier to maintain then a four stroke. All you dolts that can't adjust valves needs to turn in their man...
Two strokes are no harder or easier to maintain then a four stroke. All you dolts that can't adjust valves needs to turn in their man card.
Man card? Have any idea how many parts in a 727 Torqueflite once you scatter it out across a bench? A simple Powerglide 2speed? ?

Nevermind.......
DPW
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1995
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Dallas, TX US
10/21/2009 7:49am
could someone post up the cliff notes on this thread?

are we trying to start another series now?
JustMX
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TN US
10/21/2009 9:15am
First, I'd like to say this. Everyone who called DC names and all the bad stuff posted about people and not the subject. You kinda screwed...
First, I'd like to say this. Everyone who called DC names and all the bad stuff posted about people and not the subject. You kinda screwed yourselves over. Yes, we can close the door on this subject as far as Pro AMA. That being said, I'd like to say, I understand DC's stance and why decisions are made. First, we all know that PC, FC etc and OEM's all have most of the say. DC's stance obviously is to start it out in things that are lower on the totem pole, and show them that it is fair. Thus, having it for womens, GNCC, LL and other things, shows he actually is fighting for the cause. Someday, maybe it will be in pro motocross and pro supercross. People who called him names are just as closed minded as the 4 stroke people that are closed minded like MX7MX. Thus, we are closing the door on one side. But I've always been told, when one door closes, the other opens.

SO, here goes. Anyone that has been fighting for the 2 stroke to live. PUT UP OR SHUT UP. I am going forward with something and will need your help. This obviously isn't easy, otherwise DC wouldn't be going crazy. Anyways, here is what I need from you. Find tracks that are of National Caliber, and that are not in the outdoor Pro AMA series. I have 0 want to compete against Pro AMA sports and MX Sports. Not for the competing reason many think, but I respect DC to much to try to sabatoge anything. My only goal here is to open doors that have been closed for so long. I know there are national type tracks in Texas, and other places. We can focus on 10 tracks is my initial plan. Here are the racing classes and basic rules. There will be much more to come, but this is just an info piece.
Here is my thoughts on all of this. This is a grand opportunity for companies and teams like Service Honda. There will be no initial Homo rules, so they would be a perfect fit along with TM, Husky etc. I will be trying to contact sponsors like that soon. With different classes, we may open a whole new avenue? Old school becoming new school is my first thought.
First, it will be run much like the Desnations. ProNMX Pro National MX. MX1, MX2, MX3 all mixed to race against eachother, points will be seperate.
classes. All things are open to change at a later date.
MX1 125cc 2 stroke and 200cc 4 strokes. These will be ages up to 19.
MX2 250cc 2 stroke and 350cc 4 stroke. Over bored 250F's are permitted
MX3 Open class above other cc class restrictions. Perfect for 500AF's, or bored 490cc 4 stroke Athena kits etc.
In between each race, there will be a 10 minute seperation race. It will have the following
100cc 2 stroke and 150cc 4 strokes 14-16 males plus, Pro Females, 144cc 2 stroke and stock 250cc 4 strokes. No internal mods on the 4 strokes. The benefits of 4 strokes for females probably outway any porting etc work of a 144cc 2 stroke. The top 20 of each will compete against eachother. 2 10 minute motos.
Via suggestion Tiki: some sort of clean race, IE: electric or maybe clean 2 stroke race.

Riders will be able to sell their own clothing lines. IE: like football, you buy Tony Romos jersey.


My other thoughts are that retired racers who are interested in racing pro, may come out. I will put up and be spreading info on the Pro license soon. $10 servicing fee is the only cost. We will not be charging Pro racers to race. The payouts will be as high as possible. But it obviously will have to grow. Always wondered the reason to charge a pro to race. It isn't like we charge Tony Romo to play football every week? Another rule, is protection will be manditory. Some sort of neck brace, even a donut. Saying someone could still get hurt, thus sue, doesn't sit well with me. Helmets are manditory, but we still see tons of head injuries. Back and front protectors will be manditory to help prevent injuries by flying motorcycles crashing into the fallen rider etc. 90 db sound on 4 strokes at 10,000 RPM and 92 db at 7,000 RPM 2 strokes. That will change to agree with a certain pipe company who is working with us, but just initial thoughts. We are going to kill a ton of birds with 1 stone. Sound, safety, parity.


Anyways, slam away. I've decided after all of these heated battles, it's time to put up or shut up. I will have the company started soon. So more info will follow.

Anyone interested in donating, helping etc, please contact me. admin@miedosoracing.com
The racing is better?

The equipment is better?

I guess it depends on one's definition of better.

Maybe yours isn't the most objective view.

I am wondering if the economy has hit your business as hard as it has hit running amatuer racing events.

Just curious as to when the last time you had to buy (or sell) a bike.

zookrider62!
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6825
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Location
Plano, TX US
10/21/2009 9:22am
First, I'd like to say this. Everyone who called DC names and all the bad stuff posted about people and not the subject. You kinda screwed...
First, I'd like to say this. Everyone who called DC names and all the bad stuff posted about people and not the subject. You kinda screwed yourselves over. Yes, we can close the door on this subject as far as Pro AMA. That being said, I'd like to say, I understand DC's stance and why decisions are made. First, we all know that PC, FC etc and OEM's all have most of the say. DC's stance obviously is to start it out in things that are lower on the totem pole, and show them that it is fair. Thus, having it for womens, GNCC, LL and other things, shows he actually is fighting for the cause. Someday, maybe it will be in pro motocross and pro supercross. People who called him names are just as closed minded as the 4 stroke people that are closed minded like MX7MX. Thus, we are closing the door on one side. But I've always been told, when one door closes, the other opens.

SO, here goes. Anyone that has been fighting for the 2 stroke to live. PUT UP OR SHUT UP. I am going forward with something and will need your help. This obviously isn't easy, otherwise DC wouldn't be going crazy. Anyways, here is what I need from you. Find tracks that are of National Caliber, and that are not in the outdoor Pro AMA series. I have 0 want to compete against Pro AMA sports and MX Sports. Not for the competing reason many think, but I respect DC to much to try to sabatoge anything. My only goal here is to open doors that have been closed for so long. I know there are national type tracks in Texas, and other places. We can focus on 10 tracks is my initial plan. Here are the racing classes and basic rules. There will be much more to come, but this is just an info piece.
Here is my thoughts on all of this. This is a grand opportunity for companies and teams like Service Honda. There will be no initial Homo rules, so they would be a perfect fit along with TM, Husky etc. I will be trying to contact sponsors like that soon. With different classes, we may open a whole new avenue? Old school becoming new school is my first thought.
First, it will be run much like the Desnations. ProNMX Pro National MX. MX1, MX2, MX3 all mixed to race against eachother, points will be seperate.
classes. All things are open to change at a later date.
MX1 125cc 2 stroke and 200cc 4 strokes. These will be ages up to 19.
MX2 250cc 2 stroke and 350cc 4 stroke. Over bored 250F's are permitted
MX3 Open class above other cc class restrictions. Perfect for 500AF's, or bored 490cc 4 stroke Athena kits etc.
In between each race, there will be a 10 minute seperation race. It will have the following
100cc 2 stroke and 150cc 4 strokes 14-16 males plus, Pro Females, 144cc 2 stroke and stock 250cc 4 strokes. No internal mods on the 4 strokes. The benefits of 4 strokes for females probably outway any porting etc work of a 144cc 2 stroke. The top 20 of each will compete against eachother. 2 10 minute motos.
Via suggestion Tiki: some sort of clean race, IE: electric or maybe clean 2 stroke race.

Riders will be able to sell their own clothing lines. IE: like football, you buy Tony Romos jersey.


My other thoughts are that retired racers who are interested in racing pro, may come out. I will put up and be spreading info on the Pro license soon. $10 servicing fee is the only cost. We will not be charging Pro racers to race. The payouts will be as high as possible. But it obviously will have to grow. Always wondered the reason to charge a pro to race. It isn't like we charge Tony Romo to play football every week? Another rule, is protection will be manditory. Some sort of neck brace, even a donut. Saying someone could still get hurt, thus sue, doesn't sit well with me. Helmets are manditory, but we still see tons of head injuries. Back and front protectors will be manditory to help prevent injuries by flying motorcycles crashing into the fallen rider etc. 90 db sound on 4 strokes at 10,000 RPM and 92 db at 7,000 RPM 2 strokes. That will change to agree with a certain pipe company who is working with us, but just initial thoughts. We are going to kill a ton of birds with 1 stone. Sound, safety, parity.


Anyways, slam away. I've decided after all of these heated battles, it's time to put up or shut up. I will have the company started soon. So more info will follow.

Anyone interested in donating, helping etc, please contact me. admin@miedosoracing.com
JustMX wrote:
The racing is better? The equipment is better? I guess it depends on one's definition of better. Maybe yours isn't the most objective view. I am...
The racing is better?

The equipment is better?

I guess it depends on one's definition of better.

Maybe yours isn't the most objective view.

I am wondering if the economy has hit your business as hard as it has hit running amatuer racing events.

Just curious as to when the last time you had to buy (or sell) a bike.

Last week GuyB mentioned he was struggling to sell his 250F

The Shop

mx836
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; BF
10/21/2009 10:36am
If that is honestly the way you feel GuyB, then you haven't been to many amateur races around the country lately.
oldx
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10/21/2009 11:38am
This is nucking futs and excuse me while I LMFAO
GuyB
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10/21/2009 11:40am
mx836 wrote:
If that is honestly the way you feel GuyB, then you haven't been to many amateur races around the country lately.
I'm speaking more from a pro racing perspective.
Lightning78
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Huntington Beach, CA US
10/21/2009 2:39pm
You know, I realized something today as I was looking at my CRF250 service manual (A bike I am currently trying to sell) For all of...
You know, I realized something today as I was looking at my CRF250 service manual (A bike I am currently trying to sell) For all of you 4 stroke lovers take a look and scan through your service manual and make an observation of these things: Total moving parts in the engine, SPECIALIZED Tools required to do a service on ANYTHING 4 stroke related (head, valves, cam chain, etc.) that you wouldn't want to pay a mint to have a dealer mechanic do just as preventative maintenance, and all the technical jargon that is associated with factory suggested maintenance, AND how complicated and sensitive 4 strokes are to the hundreds of maintenance things neede to keep them safely running ....you will se that there are MULTIPLE areas for failure that need to be routinely checked and serviced that would almost need a masters degree in engineering to understand and the equation for calculating correct valve shims the first time is almost algebraic. Now look at a 2 stroke manual and compare......If you have the stones to do it yourself you are a very small minority and spending $$$ on the correct tools to even do a valve job is ridiculous not to mention the parts cost.

Now if it grenades ....... how much does that cost you? My point is that there are exponetially more areas for failure that tie into all major areas of the engine operation
One more time......just for you MX7MX, do us a favor and take a look then get back to us once you've lookied in oyur manual and applied what I posted.
10/21/2009 3:04pm
I think MX7 has chilled. I think he's good with my cc vs cc.
2T42
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753
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Zweitakt, IN US
10/21/2009 5:45pm
You know, I realized something today as I was looking at my CRF250 service manual (A bike I am currently trying to sell) For all of...
You know, I realized something today as I was looking at my CRF250 service manual (A bike I am currently trying to sell) For all of you 4 stroke lovers take a look and scan through your service manual and make an observation of these things: Total moving parts in the engine, SPECIALIZED Tools required to do a service on ANYTHING 4 stroke related (head, valves, cam chain, etc.) that you wouldn't want to pay a mint to have a dealer mechanic do just as preventative maintenance, and all the technical jargon that is associated with factory suggested maintenance, AND how complicated and sensitive 4 strokes are to the hundreds of maintenance things neede to keep them safely running ....you will se that there are MULTIPLE areas for failure that need to be routinely checked and serviced that would almost need a masters degree in engineering to understand and the equation for calculating correct valve shims the first time is almost algebraic. Now look at a 2 stroke manual and compare......If you have the stones to do it yourself you are a very small minority and spending $$$ on the correct tools to even do a valve job is ridiculous not to mention the parts cost.

Now if it grenades ....... how much does that cost you? My point is that there are exponetially more areas for failure that tie into all major areas of the engine operation
Does anybody actually think that impossible service intervals were an accident? Highly paid engineers working for the big 4 did not know what all this maintenence would cost before they put them to market? That a normal racer would have a slim chance of NOT grenading a bike at some point if he did not do ALL maintenence perfectly.

If you actually did the correct maintenence by the manual, you would spend more time working on the bike than racing it. They know there would be a snowballs chance it would be performed most of the time. Accident?

I know several guys who ride and race 4 strokes and they have all missed races because they were trying to fix there bikes or waiting to save the money for high repair bills. They never had this problem 1991-2001. What is the problem? Did bikes get more reliable and better? Really. Did they get lighter? They gained 35-40 pounds somewhere along the line. Did they get quieter?

I really really hope this new series gets going. Several of our group will attend for sure.

BRAAAP!

JOHN CHOATE
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Dallas, NC US
10/21/2009 5:58pm
I think it was in my Honda manual for my 450(in '04) that suggested replacing the chain every 3 hours or rides(don't remember which). It stated something ridiculous whatever it was.
10/21/2009 6:43pm
I think it was in my Honda manual for my 450(in '04) that suggested replacing the chain every 3 hours or rides(don't remember which). It stated...
I think it was in my Honda manual for my 450(in '04) that suggested replacing the chain every 3 hours or rides(don't remember which). It stated something ridiculous whatever it was.
and piston every 15 hours or 6 races!!!!! my trust old 98 KX250 it was recommended every 5 races but its done at 1/3 the cost and and it takes less time to do it! gotta love them 2 smokes!!! Cool
10/21/2009 11:50pm
No, it's a lot better to have the premier motorcycle riders on Earth riding second class machines instead of being on the fastest bikes possible.

Hopefully they make similar changes to all sports soon....all NASCAR cars will be four cylinders, all NBA players will be under 6' tall, no NFL players over 175 pounds, MLB players will hit off a tee and use a wiffle ball...it will be great!
10/22/2009 5:10am
As you say that HansiKursch, could you guys imagine a 350 cu inch 2 stroke in a car. Unfreakinbelievable power. Anyone do the math? How much HP? based on what we know about cc per cc power gain...
cpj36
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FL US
10/22/2009 6:04am
Tiki wrote:
Two strokes are no harder or easier to maintain then a four stroke. All you dolts that can't adjust valves needs to turn in their man...
Two strokes are no harder or easier to maintain then a four stroke. All you dolts that can't adjust valves needs to turn in their man card.
The Rock wrote:
Regardless of the valve deal you can't compare a grand for a four stroke rebuild to 150 to 200 bucks for a two stroke.
Tiki wrote:
Rock, you haven't paid a grand to rebuild a four stroke have you? Come on. I have rebuilt mine twice and still haven't hit a grand...
Rock, you haven't paid a grand to rebuild a four stroke have you? Come on. I have rebuilt mine twice and still haven't hit a grand. Yes two strokes have less moving parts, but need those parts twice as much.

In the scheme of things four strokes are just not that complicated. Thats what I am getting at. To keep this on topic, I want to see two strokes develop to what the four stroke has. Top of technology, small displacements with maximum efficiency.
Not according to amateur and pro teams, more like 4X the cost.

People think the 4 stk is still fresh because they have so much more torque that worn out, they'll still get around a track pretty good compared to a 2 stk that doesn't have much torque to lose.

Manufacturer service intervals are no better than those suggested for 2 stks. Valve springs, especially in a 250f don't last any longer than 2 stk rings, nobody changes them but there's also plenty of guys that brag about never doing anything to their 2 stks.

I know people report 100+ hours but Honda says the service life of a 450 piston and valve springs is about 15 hrs, Kibblewhite compares 450 and 250 springs to 250 and 125 rings, and in no other motorsport will you see anyone address valve train last, if at all.

Maintained correctly, like the fast guys do and manufacturers recommend, the cost and time is not even close.
SteveS
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5598
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WV US
10/22/2009 6:12am
Why are you guys arguing about the merits of the engine designs? I thought this thread was about building a race series.

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