Honda Twins banner

1 - 11 of 11 Posts

·
Registered
Joined
·
4 Posts
Discussion Starter #1
hello all,

Was wonder if any one can pint me in the direction or has had experience with an aluminum sprocket from sprocket specialists? I fitted a 32 aluminum sprocket of theirs and there seems to be way too much play between the sprocket and the large lock ring/C clip. In and Out play of sprocket. not sure if this is something i can correct with shims or spacers.


Thanks in advance,
Dan
 

·
Super Moderator
Joined
·
5,924 Posts
The c clip only keeps the sprocket from falling off, the four bolt/studs that the sprocket drives the wheel with (cushions) really position the sprocket. Are you using the original spacer, item 5 on the diagram?

REar Wheel diagram.JPG
 

·
Sensei
Joined
·
27,021 Posts
Note that 520 size parts are thinner than the original 530 bits and you have to make up the differences.....
ANY change requires others.....
 

·
Registered
Joined
·
4 Posts
Discussion Starter #4
thanks first and foremost. I was planning on using original spacer (#5). not likely any more it sounds like. For making up the difference will i have to shim both the the bolt side and the spacer side to keep the sprocket centered or just the spacer side and offset the sprocket in more? you both have been helpful.

Dan
 

·
Premium Member
Joined
·
2,004 Posts
You could probably use 2 #5 washers to shim sprocket to 530 size
 

·
Sensei
Joined
·
27,021 Posts
Since the concern is chain alignment, and that is determined by 1/2 the sprocket width spaced inward (towards the wheels) keyed by the #5 washer and the circlip on the wheel and the splined "keeper" on the front (countershaft), your "NEW" spacer will need to install inboard of the sprocket, and be exactly as thick as the difference between between the 530 and 520 sprockets, OR, you can put both spacer washers outboard IF you also put an equivalent width one between the keeper and the front sprocket.....
(Ideally, three "extra" washers 1/2 as thick as the 520/530 difference should be installed to keep the original chain center: one in and one out on the wheel, and one outside under the keeper on the countershaft sprocket, but this is actually unnecessary as the outer "edge" of the chain remains the same with the first scenario, and the chain is narrower, so tire or chainguard clearance shouldn't be an issue.....)

Just an example of ALL the aspects you must consider when making any changes....
 

·
Super Moderator
Joined
·
5,924 Posts
Find out the width of the hub on the new sprocket....Some sprocket makers are pretty sophisticated. If the application is motorcycle specific, they should make the hub thickness exactly the same as stock.... Don't guess. Ask the Sprocket maker....
 

·
Sensei
Joined
·
27,021 Posts
Excellent point Richard.....
However, you'll also need measurements on the countershaft sprocket as well....
It may or may not need shimmed to maintain the same or a matching centerline...
 

·
Super Moderator
Joined
·
5,924 Posts
The only other thing I was thinking, is if the fron and rear sprockets are the same width, the front and rear centers would both move the same...But it really depends on the hub construction....

The width difference is 0.1 inches, so it may not be quite as critical. The difference in the center would be 0.05 inches. That may not be enough to really matter. Still, I like things to be right. My steel sprockets were a little off, and the wear on the one side of my front sprocket was substantial. An aluminum sprocket will wear even faster.
 

·
Registered
Joined
·
10 Posts
Find out the width of the hub on the new sprocket....Some sprocket makers are pretty sophisticated. If the application is motorcycle specific, they should make the hub thickness exactly the same as stock.... Don't guess. Ask the Sprocket maker....
For what it's worth, I just measured the thickness on my '73 CB350G rear sprocket today, where the circlip and washer/spacer seat against, and it measured .340" thick, or about 8.6mm.

Can't be sure this applies to a CB360 though.
 

·
Premium Member
Joined
·
2,004 Posts
The front sprocket will be pulled out by the retainer so it makes sense to space the rear sprocket out using two extra #5 washers
 
1 - 11 of 11 Posts
Top