2-stroke question

Related:
Create New Tag

8/31/2009 12:39 PM

Just picked up my shiny new YZ on Friday. Realized I haven't owned a smoker since I was about 14, and even then, didn't have a clue what I was doing. (Not the most mechanically inclined person you'll ever meet.)

I'm older now so I'll be fine. Any tips from the old school 2-stroke gurus out there?

Thanks for those with serious answers, and those with smartass answers, cuz at least you might get a cheap laugh or two.

|

Osama Bin Mixin - Head of the 2-stroke Taliban

8/31/2009 1:14 PM
Edited Date/Time: 4/17/2016 1:53 AM

After breaking it in for 30-60 min's tear it down to the frame and grease all linkage, swingarm & steering bearings. Locktite all plastic bolts.

|

8/31/2009 1:50 PM

thank you

|

Osama Bin Mixin - Head of the 2-stroke Taliban

8/31/2009 2:01 PM

Spokes!

Then go out and lay waste to all those lawnmower drivers.

|

8/31/2009 2:02 PM

Congrats dood!!!
just like any new bike. before it touches dirt regrease everything.

|

8/31/2009 2:04 PM

What Lumpy says. Yamaha is horrible about greasing stuff from the factory. Grease it now or start replacing them all in a few months. Not sure about his suggestion to loctite all plastic bolts though? Maybe the fenders and fork guards but make sure to only use the blue Loctite. Take the shroud bolts off the gas tank and put anti-seize on them as soon as you get it home though! Don't want those bastards to seize up. So what did you get? 125....250.....?

|

8/31/2009 2:25 PM

cool thanks for the advice. I'll make sure to regrease her.

It's a YZ250. I'll have my girl take some pictures this Wednesday, and I'll post the ones that don't make me look like too big a goon. If I can find any lol

|

Osama Bin Mixin - Head of the 2-stroke Taliban

8/31/2009 2:42 PM

welcome to the club of non lemmings!

|

in a past life, I was myself

when opportunity knocked, it waited because I was busy

I gave my father a talking to

8/31/2009 3:05 PM

i dont know aboout the spokes, havent touched em on my 06 yet. bought an 09 instead and run the 06 as a practice bike. 51 tooth rear i've been running for a while, i like that set up. my steering stem bearings are the only things that have given me trouble on the yz's. i'm on my 3rd one.

|

8/31/2009 3:15 PM

Congrats. Just ride it! Have fun. Pick a premix and ratio and stick with it, and get the jetting right. Most seem to be too rich.

|

8/31/2009 3:17 PM

Congrads on the bike. Check out thumpertalk under the yamaha 2stroke. They Have INFO for days on that site.

|

8/31/2009 3:42 PM

Get Klotz premix, it brings back a ton of memories!

|

8/31/2009 3:57 PM
Edited Date/Time: 4/17/2016 1:54 AM

Do not locktite any bolt that threads into a nut embedded in plastic (I.E. into the tank or radiator louvers). Locktite everything else! And grease like said above. Check the lower shock bearing at least once a month if you do any amount of riding.


And have a blast! Remember, the clutch is your friend! Learning to be in the right gear for the right situation will make anybody a better rider. One thing I don't like about the 4 strokes is you can get a little lazy with 'em. They pull like magic, but again, to me they are a little bit less satisfying.

|

8/31/2009 3:59 PM
Edited Date/Time: 8/31/2009 4:01 PM

shaner708 wrote:

Get Klotz premix, it brings back a ton of memories!

Maxima 927 castor. 32:1... Just doesn't smell any better than that. Feel a little choked up even thinking about it.

|

8/31/2009 4:20 PM

shaner708 wrote:

Get Klotz premix, it brings back a ton of memories!

MPM64 wrote:

Maxima 927 castor. 32:1... Just doesn't smell any better than that. Feel a little choked up even thinking about it.

most people say to run 40:1? What would be the best ratio?

|

Osama Bin Mixin - Head of the 2-stroke Taliban

8/31/2009 4:36 PM
Edited Date/Time: 8/31/2009 4:37 PM

Read the bottle, they probably know better than internet "experts". I think you'll find that anywhere between 20:1 and 40:1 will be just fine. Most of the premixes I've use recommend 40:1 for a 250, but whatever the particular manufacturer (of the oil) recommends is a good place to be. FYI, Maxima recommends 24:1 to 40:1 for a 250.

|

8/31/2009 4:39 PM

DON'T LIFT UNTIL YOU SEE GOD, AND THEN HESITATE!

|

THIS ACCOUNT HAS TEMPORARILY BEEN LOCKED.

8/31/2009 4:59 PM

breck wrote:

DON'T LIFT UNTIL YOU SEE GOD, AND THEN HESITATE!

Best advice ever. Thanks.

|

Osama Bin Mixin - Head of the 2-stroke Taliban

8/31/2009 4:59 PM

PRM31 wrote:

Read the bottle, they probably know better than internet "experts". I think you'll find that anywhere between 20:1 and 40:1 will be just fine. Most of the premixes I've use recommend 40:1 for a 250, but whatever the particular manufacturer (of the oil) recommends is a good place to be. FYI, Maxima recommends 24:1 to 40:1 for a 250.

second best advice lol thanks!

|

Osama Bin Mixin - Head of the 2-stroke Taliban

8/31/2009 5:02 PM

I run Motul 800 in my stuff at 50:1 and have great results. Motul says it's okay too. DO NOT use anti-seize on anything. Find an anti-seize that contains no metal. I use a product from UZ Engineered products called thread ease ultra. Best stuff ever. Loctite is available in a twist type paste and works well with no mess. Stays where you put it better than the liquid. Grease is your friend but be careful what grease you use. Some greases have different base stocks that do not mix well together and can turn hard and claylike if mixed together. Don't forget the radiator braces and skid plate. HAVE FUN!!!

|

Are we gonna ride or are we gonna mess around all day?

8/31/2009 5:30 PM

Run whatever yamaha reccomends. Your gas/oil ratio affects jetting slightly.

|

8/31/2009 5:35 PM

I just pulled my 01 YZ completely apart and all of the tank inserts that were Blue locktited are fine. Its corrosion that seizes and the locktite keeps that from happening.

I have been running Golden Spectro at 50:1 for 25 years and have never had a motor blow up. I just bought a Wiseco bottom end kit to put in the old 01.....still on the stock crank. I will only use a stock Yamaha piston. Tried others and did not like how it affected the torque.

Bel Ray 80W gear saver for the trans....makes it shift buttery smooth.

Pull the axle adjuster bolts out and coat the threads with anti-seize.

|

8/31/2009 5:45 PM

BelRay waterproof Marine grease is the absolute best grease to use on linkage or steering/swingarm bearings.

|

8/31/2009 6:06 PM

Don't ride it until you take it apart and grease everything. My sons YZ85 came from the factory with barely a pea sized blob of grease in the steering head bearings and virtually nothing anywhere else.

Congrats on returning to the light! (read light weight, 2 strokes!)

|

[LINK TO IMAGE]

Chuck Norris is 1/8th Scottish. This has nothing to do with ancestry, the man ate a fucking Scotsman!

8/31/2009 6:06 PM

lumpy790 wrote:

I just pulled my 01 YZ completely apart and all of the tank inserts that were Blue locktited are fine. Its corrosion that seizes and the locktite keeps that from happening.

I have been running Golden Spectro at 50:1 for 25 years and have never had a motor blow up. I just bought a Wiseco bottom end kit to put in the old 01.....still on the stock crank. I will only use a stock Yamaha piston. Tried others and did not like how it affected the torque.

Bel Ray 80W gear saver for the trans....makes it shift buttery smooth.

Pull the axle adjuster bolts out and coat the threads with anti-seize.

Blue locktite is the key there. Most people buy red and use it on everything. Big mistake on above mentioned bolts, but is fine on steel threaded bolts. I'm willing to lose a bolt out of my radiator shroud over my swingarm nut personally. smile If you've got both types, use blue on plastics, red on big parts. If just red, don't use on plastics.

Always scared to run anything less than 40:1 myself, interesting to see folks running 50:1. I will say I see a noticeable difference between 32:1 and 40:1 in performance. I'm gonna try 50:1 to see if it gets even better. Just not made of money so play the conservative route most times. I will admit, I use the PWC Synthetic stuff from Walmart. Probably gonna get booed off the board for admitting, but haven't had a problem yet.

Should I be using a different oil? Is the Castor stuff better than synthetic? I'm not a chemical engineer, so I'm not sure I see the difference. But I do read a bunch here and haven't been let down by you folks yet. So what's the best?

|

8/31/2009 6:09 PM

Make sure you smile when you twist that thing on the right.

|

8/31/2009 6:14 PM

pulled apart my 08 YZ250F when new and found everything well greased, maybe they have fixed this at the factory level. I loved the Belray Gearsaver in the 2T, it seems like it may have an ATF mix in it, so smooth. Thats an awesome tip on the shroud bolts/loctite, I will be trying this.

|

8/31/2009 6:15 PM

pulled apart my 08 YZ250F when new and found everything well greased, maybe they have fixed this at the factory level. I loved the Belray Gearsaver in the 2T, it seems like it may have an ATF mix in it, so smooth. Thats an awesome tip on the shroud bolts/loctite, I will be trying this.

|

8/31/2009 7:08 PM
Edited Date/Time: 4/17/2016 1:54 AM

shaner708 wrote:

Get Klotz premix, it brings back a ton of memories!

44:1:

[LINK TO IMAGE]

http://www.klotzlube.com/...d=KL-100_Quart&cat=4

|

Ride like a girl!!!
2016 KTM 500 EXC-F
Current project: 2007 Kawasaki KX250-R7 retro build
Current project #2: 1987 Kawasaki KX250-E1 rider/racer resto
1989 KX125 resto
1987 RM250 resto

8/31/2009 7:20 PM

Jet the thing correctly.

No matter your oil ratio, your jetting can be adjusted to crisp perfection.

|