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Only $10 for all 2024 SX, MX, and SMX series (regularly $30).
Really amazing builds on both bikes! You have to be super happy with the results.
The Shop
In regards to the fuel, on my engine we found that straight C12 was far more octane than these engines require and we made 3/4 of a HP more on a mix of 1/3 Sunoco Supreme Leaded and 2/3 pump fuel without any detonation whatsoever.
That is a noticeable bump in free horsepower and saves some $ as well.
Awesome results & great data with all of this Blackdiamond! Looking FW to reading & seeing more!
I am as curious as you are!
The dyno chart below is the Varner tuned TM 250 (in red) vs a Varner tuned CR 250 (in blue) that Ricky Dietrich used to holeshot and lead the 2 stroke WC this year.
I'm shopping around for a small bore smoker currently, looking at the Yamaha YZ125 in normal and X trim, KTM 150SX and the TM MX 144. I currently race a 1992 Yamaha WR250ZD in supermoto trim, am quite confident on pavement but am a total newb / chicken in the dirt as I came into the sport from a road race background. I'm looking to get a smaller machine to play on in MX trim at dirt tracks to learn on, plus the occasional woods rip with friends, etc. I'm hoping the small bore machines being lighter and tamer than my current rig will inspire a little confidence in the dirt and get me jumping again? The 150SX has a sweet motor, once I adapted to it the YZ125 was nice as well, but clearly softer on bottom. What I've not been able to get seat time on yet is the TM. I've seen several reviews saying they "don't work until pushed" which makes me suspect they may be too sharp for a newb?
So, as noted, I like the 150SX, how's that MX 144 compare, out of the crate vs out of the crate?
The TM's have really bomb proof transmissions as well and some KTM's have been known to have problems in that area.
As far as the engine goes, they are similar in HP and power delivery but TM builds the 144 engine specifically for that bike unlike how KTM just uses a bigger piston and bore. The TM 144 has a completely different crank and stroke than the 125 and I think it works better on the track because of it.
Pit Row
The TM turns better and has a much better power delivery for MX... and it revs to the moon. Best transmission we’ve ever had and best components bar none. The TM is head and shoulders above in many areas... this coming from someone who loves KTM. TM is just on another level for this displacement of a bike.
Hope to see and hear in a video theses bikes singing.
How are the ergos compared to your old honda?
How about the front end feel? How does it compare at turn in vs the Honda? I’m sure the engines have a totally different feeling as well.
I am debating on whether I want to build a Honda or spend the coin on the tm in the future.
Either way I'm going to be sending him an 03 CR2 cyl. & head to have him massage it.
Wise decision on going with Varner on the TM engine mods...
Post a reply to: Full Tilt TM Racing Two Stroke Build(s) Update: Dirt Magazine "Two Stroke Tuesday"