Trx/crf pistons

[andyw]

Hi Guys

Are the pistons form a crf the same as the ones from the trx?

[fastredrider44]

I think only certain years will interchange, and they for sure won't work in 04-05 trx's

[KEVIN132]

yuh i run a crf piston in my bike but its a falicon stroker ..
norm cranks u use the trx.
i have use cp pistons and never have had a prob in 7 yrs!!

[eastside 400]

well the bore size of a 04-05 bike wouldnt allow the use of a CRF piston either 94mm is 04-05 TRX, 96 is CRF and 06+ TRX

[KEVIN132]

yuh mines a 480 jug. 530 with the crank:devil:

[gasguzzler]

The 06+ TRX uses the same bore as the CRF's. The factory piston in each are different though. The CRF uses a 2-ring set-up and the TRX uses a 3-ring. The skirts then are also shorter on the CRF.

[Scro]

Is the compression any different? What about weight?

[DnB_racing]

Originally posted by gasguzzler
The 06+ TRX uses the same bore as the CRF's. The factory piston in each are different though. The CRF uses a 2-ring set-up and the TRX uses a 3-ring. The skirts then are also shorter on the CRF. right now Im useing a 2 ring high comp cp piston!! I just installed it about only1 hour riding time on it, i will let you know if I have any issues!!

[dran714]

i believe the piston is the same on crf and 06 and up bikes is the same the only difference is the head gasket is 2 layer on a crf bumping the comp up a half a point.. the 04/05 are quite a bit different the biggest being the wrist pin size is 21mm on the early trx vs, 19 on the later crf/trx