Author Topic: 175 DT shift shaft removal  (Read 1626 times)

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Offline alexm846

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175 DT shift shaft removal
« on: September 25, 2014, 07:15:12 PM »
175 DT: So Iv'e got the RH crank cover off after realigning the crank gear & replacing the rotary valve seal.  My shift shaft spline's very worn and I figure I'd better replace it.  My question is does the shaft simply pull through from the RH side without having to split the cases? It seems to ease out easy until I get to the point where the spline would enter the LH side, where it then stops...

Thanks,
Alex

Offline Bill Black

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Re: 175 DT shift shaft removal
« Reply #1 on: September 26, 2014, 05:17:01 AM »
Looking at the parts book it should pull through maybe there is damage on the shaft near the splines ? touch of a file might help ....
Regards
Bill
1995 Grinnall Scorpion
1989 BMW K100rs
1983 Yamaha TT600
1972 Sanglas 400
1967 BSA C25T
1966 Bridgestone 175 dualtwin

Offline disc_valve

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Re: 175 DT shift shaft removal
« Reply #2 on: September 26, 2014, 09:41:29 AM »
I confirm that the shaft should just pull through the cases once the ratchet arm on the rigt hand side has been lifted clear of the shift drum. As it only binds when the splines are about to enter the case, I wonder if the bike had been dropped at some time and has bent the splined section out of line.  That should be easy enough to check with a straight edge (e.g. a steel rule). I had a similar problem with a Suzuki T125 engine, and I managed to straighten the shaft enough by pulling the shaft through until the bent section started to bind, then pitting a length of tubing over the bent end and "persuading" it straight. The shaft should bend easily enough, but make sure the bend is just entering the crankcase, otherwise you'll and up with an S-shapde shaft that definitely won't come out.

Alternatively, if the shaft really is scrap, just get out the cutting wheel and chop the end off!

Graham
« Last Edit: September 27, 2014, 06:17:11 AM by disc_valve »

Offline coxy

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Re: 175 DT shift shaft removal
« Reply #3 on: September 26, 2014, 03:25:03 PM »
I had to cut the end off mine as at some point the gear shift had been welded on I picked up a nos one for aprox $25 that was some time ago

 


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