Member Contributer MadScientist Posted March 28, 2015 Member Contributer Share Posted March 28, 2015 Does anyone know if the 6th gen uses the same clutch slave as the 5th gen? It appears to be identical from the outside, but worth checking before I order one. Link to comment Share on other sites More sharing options...
Member Contributer KevCarver Posted March 28, 2015 Member Contributer Share Posted March 28, 2015 To the Parts Fiche! Seriously, check out the parts fiche on your favorite site. I only know 5th Gen and RC51 are the same part#. Never had a need to check the 6th Gen. Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted March 28, 2015 Author Member Contributer Share Posted March 28, 2015 Yeah, I checked and the part number is different. The casting looks identical on the outside, down to the "S2" on the tab above where the hydraulic line enters. The seal and piston have different part numbers, but the spring is the same. The gasket and the pushrod oil seal are the same as well. So I decided to go ahead with it anyway, only $20 for a used part. The bore on mine is a bit rotten, was hoping a newer one may be in better shape. If nobody chimes in, I'll stop back with a clarification once I get the part. Link to comment Share on other sites More sharing options...
Member Contributer vfrcapn Posted March 29, 2015 Member Contributer Share Posted March 29, 2015 Let us know, good info for swaps if it works. Link to comment Share on other sites More sharing options...
Member Contributer KevCarver Posted March 29, 2015 Member Contributer Share Posted March 29, 2015 Sometimes it's down to paint color as far as part#s... Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted April 5, 2015 Author Member Contributer Share Posted April 5, 2015 Well, I got the new (used) slave cylinder in today and tore it down for cleaning and measurement. Turns out the 5th gen and 6th gen clutch slave cylinders are slightly different, which would make a bit of sense given that the clutch is also a bit different. Here are my results: While the housings are nearly identical externally, the bore and piston are slightly smaller. This results in a decrease in the amount of force transmitted by about 12%; i.e. if the handle used to require 20 lbs to actuate the clutch, it now takes 22.4 lbs. Coincidentally, the distance traveled by the slave piston increases by 12%, so the clutch would disengage 12% sooner than previously. The important dimension from the base of the piston to the surface that contacts the clutch pushrod ( C) is the same in both cases. The extra height of the 5th gen piston is only the lip at the very top of the piston (D). This will most likely have no effect on the function of the slave cylinder. In conclusion, I'm 99% sure the 6th gen clutch slave will work on the 5th gen bikes. The disengagement point should move away from the grip very slightly at the expense of slightly heavier lever pull. Link to comment Share on other sites More sharing options...
Member Contributer Mohawk Posted April 5, 2015 Member Contributer Share Posted April 5, 2015 Good info thanks. As a point of interest, how heavy are those pistons ? Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted April 5, 2015 Author Member Contributer Share Posted April 5, 2015 Pistons: 5th gen = 105g 6th gen = 85g Housings: 5th gen = 118g 6th gen = 129g Link to comment Share on other sites More sharing options...
Member Contributer Duc2V4 Posted April 5, 2015 Member Contributer Share Posted April 5, 2015 Nice job, you really live up to your screen name! Link to comment Share on other sites More sharing options...
Member Contributer Switchblade Posted April 5, 2015 Member Contributer Share Posted April 5, 2015 Can you do a little better with your analyses? Awesome work ! Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted April 7, 2015 Author Member Contributer Share Posted April 7, 2015 Can you do a little better with your analyses? Awesome work ! Actually I can... This has got me wondering if we can reduce clutch pull force by using a 5th gen slave with a 6th gen master. The part numbers for the master cylinder piston rebuild kits are different between the 5th and 6th gen masters, was wondering if someone out there has a 6th gen master they can measure? Alternatively, if someone is planning on rebuilding their 6th gen clutch master, I would be willing to buy an OEM rebuild kit and resell it to whoever needs it. Then I can measure and directly compare the 5th and 6th master pistons. Contact me by PM if you are interested. I think I am going to use a 5th gen master on my bike, so I will rebuild this 6th gen and sell it. Classified ad to follow. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.