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Post by neathbikebreakers on Dec 3, 2021 0:25:15 GMT 1
Hi just replaced my ypvs clutch basket with a banshee wiseco clutch basket and also installed new straight cut primary gears. I used new thrust washers,new bronze bush and new genuine clutch bush after putting it all together i seem to have a lot of in and out play between the basket and hub after taking it back off and placing the clutch on a flat surface it seems the centre bush is now too long and is causing the play. I have attached a video any help will be much appreciated  thx |
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Post by stusco on Dec 3, 2021 8:33:12 GMT 1
Do you have both thrust washers fitted?
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Post by jon on Dec 3, 2021 8:33:16 GMT 1
Are both thrust washers fitted?
Jon
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Post by jon on Dec 3, 2021 8:34:00 GMT 1
Do you have both thrust washers fitted? Beat me to it by a second LOL. Still confirms a possibility. Jon |
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Post by neathbikebreakers on Dec 3, 2021 9:10:16 GMT 1
 Hi yes both washers are fitted:) |
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Post by neathbikebreakers on Dec 3, 2021 9:11:59 GMT 1
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Post by headcoats on Dec 3, 2021 10:32:53 GMT 1
You say the centre bush is too long ?
Could it be the bush is correct but the new straight cuts and the basket not wide enough
Is the cog on the back of the primary gear for the idler and kickstart
Has it had a new bearing on the clutch side, is it the correct width |
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Post by neathbikebreakers on Dec 3, 2021 11:00:12 GMT 1
headcoats thats it yes the straight cut gears are not wide enough,i had to swop the kickstart gear over to the new straight cut gears by pressing it on the bronze bush. i can tap the bush out slightly which will move the kickstart gear out and take up the slack but i would have thought the gear should be pressed all the way home |
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Post by Robbieben on Dec 3, 2021 11:24:23 GMT 1
I'd say to measure the thickness of each of the main parts at the centre bush mounting and to compare them with the original parts, it is possible that either the basket or the gear has been incorrectly machined when made. Find which part is wrong then either get a correct part or you could possibly add an extra thrust washer to line everything up.
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Post by Tobyjugs on Dec 3, 2021 23:15:45 GMT 1
I don't see your inner clutch hub moving?
It should also slide up and down the input shaft splines easily. Is this causing the problem?
It just so happens that i am in clutch mode at the moment.
The two thick thrust washers that have been mentioned should be 3mm thick each.
The primary gear wheel and kickstart gear wheel when correctly assembled should be about 34.5 mm deep/long. The kickstart gear is pressed into the primary gear wheel. The bronze/steel bush holds both parts together when fully assembled the bush should sit roughly 1.0 mm inside the outer edges of the assembled gears.
The brozne/steel bush is 32.7 mm long.
The steel insert that fits around the input shaft and in the bronze/steel bush is 35.0 mm long.
The thickness of the inner basket/hub is 17.0 mm long/deep
Once the locking tab and nut is fitted the whole assembly should pull up tight also pulling the input shaft into place. You should feel no axial movement of the input shaft but you should feel some axial movement of the outer clutch basket (this varies but not more than 0.50 mm guesstimate) also some radial movement due to the tolerance of the bronze/steel bush. This is needed for the oil film/fluid wedge or whatever you like to call it.
i hope this gives you some reference points to pin point your problem.
Robbies suggestion about making a thicker thrust washer sounds like the way forward if you find incorrect parts.
What make primaries are you using? I only know of three makes Liberty gears, Nova and home grown Norbo primaries. All of these primaries fit without problems you are showing in your video.
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thx 
