Posts
922
Joined
8/9/2010
Location
Thompsons Station, TN
US
Edited Date/Time
7/26/2020 3:25am
I have a friend looking to build his son a National Level Motor for his YZ 250F. The kid is injured right now and will miss Loretta’s but should be riding again soon. They had used a builder from one of the training facilities but they epoxy broke loose and trashed the motor. So needless to say they are looking for another builder.
I wanted to get some opinions of the 4-stroke builders and your experience with them. Some of the names that come to mind are listed below.
Ed Torrance
XPR Motorsports
Bundy Built
Twisted Development
Tom Zont Racing
C4MX
Terry Varner (I know his 2-stroke motors are great)
Has anyone dyno’d the GYTR setup in comparison?
Thanks in advance!
I wanted to get some opinions of the 4-stroke builders and your experience with them. Some of the names that come to mind are listed below.
Ed Torrance
XPR Motorsports
Bundy Built
Twisted Development
Tom Zont Racing
C4MX
Terry Varner (I know his 2-stroke motors are great)
Has anyone dyno’d the GYTR setup in comparison?
Thanks in advance!
What did you hear?
The Shop
Numerous people waiting a long time.
Terry has taken a couple weeks longer with my motors in the past but nothing too crazy. I can tell you this the Tom Morgan YZ 250 runs good but it's not in the same league as Terry's YZ.
I just had a friend send their KTM 150 to Varner back in April and he turned it in a week. The dad and son both had 150's and the dad bought a KTM 350. After riding the Varner 150 he said he should have kept his 150 and had it modded. He used the same specs from the motor he just did for Jeff Emig. Alessi also sent YZ 125 motors to several builders and chose the Varner mod.
It sounds like he got behind or needs some help. I hate reading this because the guy is a 2-stroke guru.
They have the GYTR kit on one of the bikes now and it runs good but they are looking for a national level motor.
Good people
I trust those dudes. And they are honest blue collar working man type of dudes.
I personally have a built yz250f from Twisted and its a really strong motor.. your kid will be able to pull holeshots on gates with 450's... As long as the kid isnt 200+lbs.. i pull holeshots in the vet class on my 250F at 200lbs, but were fat slow older have jobs and a house kind of dudes..
A national level motor will run you about 8-10K, or a big bore kit for the practice bike(about 2500-3000) which is very similar power wise to the race bike.
Twisted Development built the ClubMX engines this year, and those were by far the fastest privateer bikes on the track, id say every bit as fast as every factory bike, outside of maybe a 1-2% advantage by the Star bikes due to Yamaha Engineers.
Do they offer a big bore kit? Also how often do you need to rebuild it?
Todd is a low key mellow guy, but he gets the job done. Known him for years and he builds some fast, strong and reliable stuff.
Pit Row
This is him on Scott Russell’s bike. I’m happy to get you in contact if you like.
and Rebuild depends on how you ride the bike.. generally speaking the same as stock intervals.. so if you hammer stock pistons at 20hrs. i would do a piston at 20 hours on the big bore too..
http://www.td-racing.com
Period
give me call TZR
I know Twisted has a lot of time building race Yz250Fs. I used them on KTM builds.
I’ve also had XPR do ECU work in my Honda.
Both groups are very honest and reliable.
Note: More than one factory team has their heads CNC ported by Dan. He's behind the scene doing a lot of work for names we all know very well.
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