Planet Minis

gbunner · 05-02-2009, 03:41 PM

I am working on a 1995 Z50r and it has a few bad transmission gears, The smallest gear on the input shaft(actually part of the shaft) and the large gear on the output shaft(I think it is 1st gear). I have a stock transmission from a newer Crf50. When I check the actual part numbers, they are different. Can I replace just the 2 bad gears with parts from the CRF50, or would I have to swap out the complete transmission?

Thanks, Gary

nlipshutz · 05-02-2009, 03:49 PM

If it was me, i would swap out the whole transmission.... If you just swap out the gears they might not mesh right if the gear ratios are different on each transmission. It's just to be safe, cause those things are a bitch to tear down again if u screw up.

gbunner · 05-02-2009, 04:07 PM

Do you know if it is a straight up swap if I use the complete trans? Aren't the Z50's shift pattern 3 down, where as the CRF50 is 3 up? Will that cause any problems? I do have the shift drum, and forks for the CRF. I guess I would use that also?

dirtbkr188 · 05-02-2009, 04:12 PM

Since you have access to a complete CRF trans cluster, including the shift drum and forks, just drop the whole assembly right into place. If you're used to the 3-down shift sequence, just swap the drum/forks, and keep the 3-down shift pattern with the CRF trans. Should you use the CRF trans, you will need a CRF-style sprocket, the splines on the countershaft are different.

gbunner · 05-02-2009, 07:29 PM

Thanks, thats probably what I will do.

05-02-2009, 03:41 PM	#1 (permalink)
gbunner 2nd Gear Member Join Date: Sep 2008 Location: Greensburg, Pa. Posts: 668	Transmission Interchange, Z50r - Crf50 I am working on a 1995 Z50r and it has a few bad transmission gears, The smallest gear on the input shaft(actually part of the shaft) and the large gear on the output shaft(I think it is 1st gear). I have a stock transmission from a newer Crf50. When I check the actual part numbers, they are different. Can I replace just the 2 bad gears with parts from the CRF50, or would I have to swap out the complete transmission? Thanks, Gary

05-02-2009, 03:49 PM	#2 (permalink)
nlipshutz 2nd Gear Member Join Date: Aug 2008 Location: Fort Worth, TX Posts: 309 My Mood:	Re: Transmission Interchange, Z50r - Crf50 If it was me, i would swap out the whole transmission.... If you just swap out the gears they might not mesh right if the gear ratios are different on each transmission. It's just to be safe, cause those things are a bitch to tear down again if u screw up.

05-02-2009, 04:07 PM	#3 (permalink)
gbunner 2nd Gear Member Join Date: Sep 2008 Location: Greensburg, Pa. Posts: 668	Re: Transmission Interchange, Z50r - Crf50 Do you know if it is a straight up swap if I use the complete trans? Aren't the Z50's shift pattern 3 down, where as the CRF50 is 3 up? Will that cause any problems? I do have the shift drum, and forks for the CRF. I guess I would use that also?

05-02-2009, 04:12 PM	#4 (permalink)
dirtbkr188 3rd Gear Member Join Date: May 2004 Location: New Jersey Posts: 2,973	Re: Transmission Interchange, Z50r - Crf50 Since you have access to a complete CRF trans cluster, including the shift drum and forks, just drop the whole assembly right into place. If you're used to the 3-down shift sequence, just swap the drum/forks, and keep the 3-down shift pattern with the CRF trans. Should you use the CRF trans, you will need a CRF-style sprocket, the splines on the countershaft are different. Last edited by dirtbkr188; 05-02-2009 at 06:40 PM.

05-02-2009, 07:29 PM	#5 (permalink)
gbunner 2nd Gear Member Join Date: Sep 2008 Location: Greensburg, Pa. Posts: 668	Re: Transmission Interchange, Z50r - Crf50 Thanks, thats probably what I will do.

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