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Message started by Justinmkantor on 07/31/09 at 14:03:25

Title: Suggestions on my transmission issues
Post by Justinmkantor on 07/31/09 at 14:03:25

So I bought a parts bike which runs. I got it runing for a friend 1 year ago, he let it sit until I just bought it. Want to swap the engine but smokes to bad I believe to be worth the swap. Maybe I could just swap the transmissions? How hard/easy to swap a 4 speed for a 5 speed?Suggestions welcome. Fairly mechanic savey but wondering if this has been done. Also switched from Lancer carb and 180 and 17.5 jets witht he dyna muffler which ran well to a jardine muffler. Runs OK at idle but when I start riding its sputter and then does not start up again. Triedto adjust using the Lancer method but having difficulty.

Title: Re: Suggestions on my transmission issues
Post by Ed L. on 07/31/09 at 14:14:02

The top end, jug, piston and head are the same for all years. If you put the 5 speed transmission into a 4 speed frame you will need to change over some of the wire harness. The ignitions are a little different and are not interchangable. The gear clusters are different and won't work if you try to swap them in the cases. The best way would be to just pull the cylinder and head and swap them while leaving the transmission alone.

Title: Re: Suggestions on my transmission issues
Post by verslagen1 on 07/31/09 at 14:20:12

Tranmission swap can't be done, forgetaboutit.
Trans is integral to the case. Final ratio same for 4spd/5spd
You can swap bottom ends though or top ends
Smoke can be rings or valve seals.
suggest you replace valve seals and see how it goes.
If rings (check compression) have cylinder bored get oversized piston and ring set.

Title: Re: Suggestions on my transmission issues
Post by Justinmkantor on 07/31/09 at 14:29:36

Was planning on changing much of the wiring anyways. Any other gear ratio problems? HOw hard is this? I looked at the manual and I would have to remove the engine ans split the case. That is beyond my scope. I did just put in seafoam but I thought it all burnt out. Might not have. Was going to switch because sometimes it does not downshift one after another. Now i have to keep in gear a little then it shifts. Any suggestions on how to fix that?

Title: Re: Suggestions on my transmission issues
Post by Justinmkantor on 07/31/09 at 15:51:42

OK. Tried again and it was just the Seafoam burning. will switch the engine and wiring and trans whole in a couple of weeks when I have time. Also switching tins will be quite a different bike!