Author Topic: YZ Clutch Cover on DT1-RT1 cases  (Read 4551 times)

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Offline Tahitian_Red

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YZ Clutch Cover on DT1-RT1 cases
« on: May 23, 2017, 09:39:05 am »
I think someone gave me the answer here years ago, but as with a lot of things I forgot.  Will the YZ A-B clutch covers fit on the DT1-RT1 cases?
The "Factory Novice"
California, USA

'74 Suzuki TM100, '75 Bultaco 250 Pursang, '77 Honda XR75, '77 Suzuki RM125B, '77 Yamaha YZ400D, '79 Honda CR250RZ Moto-X Fox Replica, '83 Honda ME480RD Mugen

Offline TT5 Matt

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Re: YZ Clutch Cover on DT1-RT1 cases
« Reply #1 on: May 23, 2017, 11:13:42 pm »
don't know but 1 way of checking is by the part numbers on the clutch cover gaskets,same numbers = it will fit.also check kick starer seal numbers in case they changed shaft sizes

Offline Tahitian_Red

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Re: YZ Clutch Cover on DT1-RT1 cases
« Reply #2 on: May 24, 2017, 03:40:08 am »
Thanks!  :)

Gasket number is the same (308-15461-09-00), but different KS oil seal numbers (93104-20007-00 vs. 93101-20048-00). :-(

Maybe I will order both seals to see if the difference is shaft diameter, mounting hole size or depth/width.
« Last Edit: May 24, 2017, 03:53:33 am by Tahitian_Red »
The "Factory Novice"
California, USA

'74 Suzuki TM100, '75 Bultaco 250 Pursang, '77 Honda XR75, '77 Suzuki RM125B, '77 Yamaha YZ400D, '79 Honda CR250RZ Moto-X Fox Replica, '83 Honda ME480RD Mugen

Offline TT5 Matt

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Re: YZ Clutch Cover on DT1-RT1 cases
« Reply #3 on: May 24, 2017, 11:35:54 pm »
yeah there's always something  different when trying to fit parts from a different models but ask Iain Cameron on here as he's got a lot of early 2t yammies and would know what interchanges between the different models

Offline farmpro

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Re: YZ Clutch Cover on DT1-RT1 cases
« Reply #4 on: June 06, 2017, 06:56:21 am »
The clutch covers fit the bolt pattern and gasket but the kick start shaft is different on the YZ.If you don't change it,the cover cracks around the seal when you tighten it up.The DT/RT shaft can be modified by making a new groove for the snap ring further in.I think it was about 1/4 inch but I haven't done one in years.I hope this helps.If you can't figure something out let me know and I'll pull one of mine apart to see the distance.


Bill Davis    Texas Vintage Racing Club 

Offline Tahitian_Red

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Re: YZ Clutch Cover on DT1-RT1 cases
« Reply #5 on: June 06, 2017, 07:56:33 am »
Thanks Bill.  :)
The "Factory Novice"
California, USA

'74 Suzuki TM100, '75 Bultaco 250 Pursang, '77 Honda XR75, '77 Suzuki RM125B, '77 Yamaha YZ400D, '79 Honda CR250RZ Moto-X Fox Replica, '83 Honda ME480RD Mugen

Offline Iain Cameron

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Re: YZ Clutch Cover on DT1-RT1 cases
« Reply #6 on: June 06, 2017, 10:29:50 pm »
There are two ways to fit a YZa or b cover on a DT or RT . use the later D/RT kick starter I think its a DT2 or RT2 one or you can use a 6mm alloy plate cut as a gasket . If the motor is early DT1 with the gear shaft through to the right side you need an early YZa with the through shaft option or change the shaft to a shorter one .
Yamaha tragic ; dt1, rt1, dt2, rt2, dt2mx , rt2mx , mx250, mx360,sc500, 74dt125, yzx125, yzc250, yzc400, yzd250, yzd400, yzh250, yzh80 , dt100 , xr75 ko xr80 03 , it175 82 . Not a member of any club