Full Tilt TM Racing Two Stroke Build(s) Update: Dirt Magazine "Two Stroke Tuesday"

blackdiamond
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blackdiamond 7/5/2018 1:39pm
7/5/2018 1:39pm
FWYT wrote:
Dude! I told you . . . you are a parts cross-referencing master. You must reveal your secrets!
I got lucky on this one and found it on eBay, it was a random find.

I think I just get lucky and find this stuff, I really don't have any secret method but it does seem like it I guess.

blackdiamond
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blackdiamond 7/5/2018 11:02pm
7/5/2018 11:02pm
I decided to completely eliminate the side wings on the OEM glide plates. With today's tracks being over prepped 90% of the time I felt the extra protection was not needed and I was able to save around 1/4 lb by getting rid of them (for free) There just aren't that many rocky moto tracks these days so it just makes sense to get rid of the extra material.

In addition to that, by trimming them and drilling holes in them it not only makes them much lighter but it also makes the bike much easier to clean.

Here are a few pics of the finished product.







Here is what they looked like before I trimmed the "wings"



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blackdiamond
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blackdiamond 7/5/2018 11:12pm
7/5/2018 11:12pm
The TM's have A LOT of case bolts holding them together so replacing them all with Ti is a lot of work but the end result is worth it.






8
racerx317
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racerx317 7/7/2018 9:23am
7/7/2018 9:23am
FYI... KX100 Flo Pegs with YZ Springs works great. Just need to grind the stops a bit and they fit like a glove!


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The Shop

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Derek Harris 7/10/2018 7:37pm
7/10/2018 7:37pm
CarlinoJoeVideo wrote:
TM should have you on payroll for all the R&D you’re doing! So clean!
blackdiamond wrote:
That sounds like a great idea to me Laughing

Jrewing wrote:
I might of read that a Kiwi is the head of their 2 stroke engine developement. Need me to put a word in haha? I'm planning...
I might of read that a Kiwi is the head of their 2 stroke engine developement. Need me to put a word in haha? I'm planning on dropping in to the factory in a few days time.
Wobbly?

Jrewing
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Jrewing 7/11/2018 12:20am
7/11/2018 12:20am
blackdiamond wrote:
That sounds like a great idea to me Laughing

Jrewing wrote:
I might of read that a Kiwi is the head of their 2 stroke engine developement. Need me to put a word in haha? I'm planning...
I might of read that a Kiwi is the head of their 2 stroke engine developement. Need me to put a word in haha? I'm planning on dropping in to the factory in a few days time.
Derek Harris wrote:
Wobbly?

From ESE fame!
And I never made it to the factory.. lived the good life the night before and the 1 1/2 drive was beyond me.
Derek Harris 7/11/2018 6:10am
7/11/2018 6:10am
Jrewing wrote:
I might of read that a Kiwi is the head of their 2 stroke engine developement. Need me to put a word in haha? I'm planning...
I might of read that a Kiwi is the head of their 2 stroke engine developement. Need me to put a word in haha? I'm planning on dropping in to the factory in a few days time.
Derek Harris wrote:
Wobbly?

Jrewing wrote:
From ESE fame!
And I never made it to the factory.. lived the good life the night before and the 1 1/2 drive was beyond me.
Wobbly does some Kart work with them "back door" - and has both beaten factory TM in natl level events with his TM motors - and helped them beat the competition with some innovations he had come up with - smart dude.

Bummer you couldn't tour - It's on my list - but I bet the rest of your experience there was worth it!
1
Jrewing
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Jrewing 7/11/2018 11:49am
7/11/2018 11:49am
Derek Harris wrote:
Wobbly does some Kart work with them "back door" - and has both beaten factory TM in natl level events with his TM motors - and...
Wobbly does some Kart work with them "back door" - and has both beaten factory TM in natl level events with his TM motors - and helped them beat the competition with some innovations he had come up with - smart dude.

Bummer you couldn't tour - It's on my list - but I bet the rest of your experience there was worth it!
Crafty bunch those Kiwis.
1
Jrewing
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Jrewing 7/11/2018 12:14pm
7/11/2018 12:14pm
Curious what spark plugs you use? Standard or R series?
blackdiamond
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blackdiamond 7/11/2018 1:38pm
7/11/2018 1:38pm
Jrewing wrote:
Curious what spark plugs you use? Standard or R series?
After some really tedious acid etching and media blasting to strip the rainbow colors off the Ti pegs the final result turned out pretty sweet. It was really, really hard to get the colors off and I am fairly certain that they were not anodized as I originally thought. I am 90% sure that they were PVD coated (Ti nitride) based on the difficulty I encountered to remove the color.

After stripping and blasting them I put a satin/polished finish on the perimeter of the pegs to make them look a bit more like a Factory Honda peg because the design is almost an exact copy of them.




5
DJV804
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DJV804 7/11/2018 1:54pm
7/11/2018 1:54pm
Jrewing wrote:
Curious what spark plugs you use? Standard or R series?
blackdiamond wrote:
After some really tedious acid etching and media blasting to strip the rainbow colors off the Ti pegs the final result turned out pretty sweet. It...
After some really tedious acid etching and media blasting to strip the rainbow colors off the Ti pegs the final result turned out pretty sweet. It was really, really hard to get the colors off and I am fairly certain that they were not anodized as I originally thought. I am 90% sure that they were PVD coated (Ti nitride) based on the difficulty I encountered to remove the color.

After stripping and blasting them I put a satin/polished finish on the perimeter of the pegs to make them look a bit more like a Factory Honda peg because the design is almost an exact copy of them.




That turned out killer! Nice work!
blackdiamond
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blackdiamond 7/11/2018 1:55pm
7/11/2018 1:55pm
This is what they looked like before I started working on them.


blackdiamond
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blackdiamond 7/12/2018 1:15pm
7/12/2018 1:15pm
Some special machining was needed on some specific hardware in various places on the bike. Below are some before and after pics of the bolts.

These lower footpeg bracket bolts are required to clear the custom Ti pegs.



These are some special bolts I made for the upper chain roller.




1
blackdiamond
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blackdiamond 7/16/2018 2:29am
7/16/2018 2:29am
Custom low profile Ti kickstart bolts.

TM is very careful to downsize the hardware anywhere they possibly can on the 125/144 models to save weight and the kickstart bolt is a perfect example of that.






blackdiamond
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blackdiamond 7/20/2018 9:16pm
7/20/2018 9:16pm
Finally got the custom domes in today for the VHM heads. These things are trick and they have some significant differences from stock.





Here is a pic of the cooling passages on the VHM head for the 250 compared to stock. There is definitely much more coolant flow going on with the VHM head.



Here is a pic of the blank dome for the 144 before machining.










wideopen198 7/21/2018 2:57pm
7/21/2018 2:57pm
You still looking for a better reed valve? (CNC milled aluminium) Maybe I can help you into the right direction. Shoot me a PM.
MadsDausel 7/21/2018 3:25pm
7/21/2018 3:25pm
Who makes the dome? and what squish and volume?
blackdiamond
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blackdiamond 7/22/2018 12:17am
7/22/2018 12:17am
MadsDausel wrote:
Who makes the dome? and what squish and volume?
VHM makes the domes and they offer them in many different volumes but you can also get blanks so tuners can make custom domes for different applications.

Pit Row

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philG
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philG 7/22/2018 5:17am
7/22/2018 5:17am
Heikki at VHM did us a few for the 300 SMX.. we had blue ones.. worth at least 3 hp lol
blackdiamond
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blackdiamond 7/22/2018 10:46pm
7/22/2018 10:46pm
Finally starting to put the 250 together.

Today I got a chance to get the head on and adjust the PV cables. I got rid of the allen bolts on the cylinder head and replaced them with Ti hex head bolts so they would be easier to torque and the heads would not fill up with dirt.






3
blackdiamond
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blackdiamond 7/22/2018 10:50pm
7/22/2018 10:50pm
Kickstart detail.


3
blackdiamond
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blackdiamond 7/23/2018 5:30pm
7/23/2018 5:30pm
wideopen198 wrote:
You still looking for a better reed valve? (CNC milled aluminium) Maybe I can help you into the right direction. Shoot me a PM.
PM sent.
wideopen198 7/24/2018 3:12am
7/24/2018 3:12am
wideopen198 wrote:
You still looking for a better reed valve? (CNC milled aluminium) Maybe I can help you into the right direction. Shoot me a PM.
blackdiamond wrote:
PM sent.
Sent one back. Keep me updated. If they can't help you I can maybe give you another contact.
blackdiamond
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blackdiamond 7/28/2018 6:31pm
7/28/2018 6:31pm
I finally got some time to work on the bikes again and mounted the modified radiators on the 250. The billet filler neck requires a Japanese style cap instead of a Euro style so I switched it out for a high pressure version.


1
blackdiamond
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blackdiamond 7/29/2018 3:40pm
7/29/2018 3:40pm
I decided to bump up the countershaft sprocket to a 14T and soon realized that isn't as easy as it sounds. A small bit of machining is required for the larger sprocket to clear the slider locating tab on the front of the swingarm. I had to remove approximately 2mm of material to make it work.


1
blackdiamond
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blackdiamond 7/29/2018 11:47pm
7/29/2018 11:47pm
I am still waiting on suspension parts to finish the 250 but I wanted to get a few heat cycles in the motor prior to final assembly. I was able to get the rest of the bike together enough that it would at least run.




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blackdiamond
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blackdiamond 7/30/2018 1:14am
7/30/2018 1:14am
1st heat cycle on the 250.

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cdoggy81
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cdoggy81 7/30/2018 5:54am
7/30/2018 5:54am
That bad boy is awesome!!! Smile Great work & attention to detail all the way through. Have you given any thought to getting some 7068 axles for them though??? Hahahahaha J/K buddy ?
For real though these are sick rides & I’m looking fw to hearing how she performs.
blackdiamond
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blackdiamond 7/30/2018 12:39pm
7/30/2018 12:39pm
cdoggy81 wrote:
That bad boy is awesome!!! :) Great work & attention to detail all the way through. Have you given any thought to getting some 7068 axles...
That bad boy is awesome!!! Smile Great work & attention to detail all the way through. Have you given any thought to getting some 7068 axles for them though??? Hahahahaha J/K buddy ?
For real though these are sick rides & I’m looking fw to hearing how she performs.
Ha ha... I think I will pass on the aluminum axles. The stock axles on the TM's are a really light taper-wall design that is much lighter than most to start with.
Zesiger 112
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Zesiger 112 7/30/2018 5:46pm
7/30/2018 5:46pm
Blackdiamaond
If you have the chance can you look at the fork lugs and tell me if they match yz lugs? I have a brembo caliper I want to put on my yz and want to see if the tm hanger will work.

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