After handling related modifications this, to me, this makes good sense. Self-adjusting. Direct. Simple.
The first ones I saw were Kawasaki GPZ slave cylinders and matching master cylinders. Easy. Cheap. Effective. Means modifying the left hand engine cover. Opening out the hole. Sanding a flat spot on the case outside. Drilling for mount screws. Making an adapter for the push rod. Install. Bleed. Check. Use. A day-no problems.
GPZ900 slave cylinder
I have a unit that bolts directly into the left case. No modifications. Push rod adapter required.
VA (stainless steel) slave cylinder … using tidily small KTM master cylinder … bolts into original case … here it_s test mounted to an old cover that was just hangin around (actually i was about to use the cover as a test mount for a KTM slave cylinder)
slave cylinder … from inside case
setting up a KTM slave cylinder
Or this one. Hidden inside the case.
slave cylinder hidden inside the case … FZR master cylinder
from outside
slave cylinder
Years ago Tony Hall used to produce these. They became harder to find than chicken lip-socks (rarer than hen’s teeth). Ivan Hoey (Australia) began producing these once more some years ago. Fits direct to the original clutch basket.
I scored a set and have been running them ever since. Love them. 3 fewer teeth on the primary gear, 5 more on the drive gear. Increases the transmission output while decreasing crank rotation.
Original … 27:72 … 2.66
Ivan +20% … 32:69 … 2.16
Together with Terry’s vescanite clutch dampers. The vescanite dampers don’t break like the springs.
Two of the better modifications I’ve done.
original primary gear … with vescanite dampers
high ratio primary gears … with vescanite dampers
Ivan has just produced a new batch. Improved. The inner bush has been replaced with a needle bearing.
Ivan’s new set … + needle bearing
This is a small run. If interested he is now taking orders. Requires a deposit. Email contact here … ltr.management@bigpond.com
He can also do a needle bearing conversion on your stock primary gears. Dramatically improves gear and neutral selection. Also when stationary.
Includes needle, inner and thrust races, thrust washer, 3x screws/nuts and fitting instructions.
convert original primary gears to needle bearing
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