Not all the spec's, that's why I'm looking for a used one to double check if it will work. I know they are shorter on the flywheel side and longer on the clutch side the trx/atc cranks. But if that's all that's different I can make it work for sure.
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The CR cranks, are shorter on the flywheel side than a TRX crank, but that is because the CR250R engine is narrower than the TRX engine. The clutch side web of the CR cranks, 80s, measure out the same, other than inside after the tin removed. Only difference detween the two, they are balanced quite a bit more than a TRX crank & the CR cranks dont have the little dot on the end to time the crank balencer gear up to.
I have a crank in my daughters 250R right now, that has the TRX flywheel side web & a CR web on the clutch side. Kinda balences it out a bit more for a big bore.
Unless you really do a lot of changes, machining to the left side TRX case half, you cant mount a flywheel onto the full CR crank installed into the TRX cases.
CR250R, TRX250R & CR500R cranks, all have the same measurement on the journals for the main bearings. The main bearings are the same measurments as well for each engine & only difference is name brand & theres a normal 7 ball bearing or an 8 ball version you can get.
One other thing needs to be noted of, the OEM Honda cranks are all slip fit into the clutch side main bearing. The aftermarket Hot Rods cranks are machined just a slight bit different & will not slip fit into the clutch side main bearing, so keep note of that should you get a Hot Rods crank.
Neil
