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16t swap on XR650L question

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I searched the 16t threads and didn't see the answer, so here goes. I swapped out the factory 15t front sprocket for the Sprocket Specialists Yamaha part #514x-16. The 16T is flat on one side and has a hump on the other. When I compared the two, the humped side appeared to be the engine side so I put that towards the inside when I mounted it. There was still quite a bit of space between the sprocket and the retaining groove. I used the factory retaining plate as a spacer and used two E-clips to retain the sprocket. Everything I read talked about using a 24mm or 7/8 E-clip. I bought some 7/8 E-clips and they were too small. I had to file them larger and use two of them. Everything appears correct and the factory plastic cover fits with no problem. The only thing that appears to interfere was a rubber boot covering an electrical connection inside the area the sprocket occupies. That was minimal so I took it for a test drive for about 6 miles. It appeared to work fine and I inspected it upon return and found no issues. Did I mount it correctly? Did I miss something?

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you got the plastic cover to fit on with that sprocket????!!! Can you send us a picture of that trick?

I haven't put mine on yet because I've been too lazy to get the circlips, but I did test fit it, and there was no way my plastic guard would clear it.

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All I did was take off the stock toss on the 16 a put 2 circle clips on because the groove is wide. Been running like that since with no issues at all. There is plenty of play in it, but no more than the stock from what I can tell. I guess if you are nervous check it often but I have had no issues.

Tim

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No problem with the cover fitting. Slides on just as easy as it did with the 15t sprocket.

Cover off:

rlb5go.jpg

Cover On:

2w69ekj.jpg

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Nice clear pics. Wow, I must be missing something, I'm going to take a pic of mine, I'm *certain* I remember there being a lot of interference.

Thanks!!

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No problem with the cover fitting. Slides on just as easy as it did with the 15t sprocket.

Cover off:

rlb5go.jpg

I was wondering why (if it's the case) you have the stock keeper on there?

Is it locked into the keeper groove, or floating next to the sprocket on the splines?

If it's that last way, won't your sprocket be spaced too far 'in' on the coutershaft and be misaligned with the rear sprocket?

Dave

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I used the original lock ring as a spacer to get as close as possible to the factory setback of the sprocket. When bolted up, the factory sprocket is set back approximately .333inch from the end of the spindle to the outside edge of the sprocket teeth. There is a hump on the outside of the factory 15t sprocket that is approximately .100 thick. The factory lock ring is approximately .125inch thick. Using the factory lock ring as a spacer sets the 16t sprocket back approximately .346inch, when used with two E-clips, and allows some clearance for the sprocket to move. Without the spacer, the 16t sprocket would be allowed to slop in and out too much. Although I don't know whether that would hurt anything. The factory lock ring is not in the factory groove, but set back and locked onto the spindle by the two E-clips which are in the factory groove. I wanted the 16t sprocket to fit as closely as possible to the chain and spindle as the factory 15t.

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I was wondering why (if it's the case) you have the stock keeper on there?

Is it locked into the keeper groove, or floating next to the sprocket on the splines?

If it's that last way, won't your sprocket be spaced too far 'in' on the coutershaft and be misaligned with the rear sprocket?

Dave

I was thinking the exact same thing, I would be worried that putting the stock keeper on would hold the sprocket too far on the spline. Not sure with a stock tire, but I looked at it on my sumo set up and realized it would never work, not enough play and waaay too much chain rub. I guess on stock your tolerance would be greater and it may work fine.

Tim

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I'm new to the game and trying to learn as much as possible. Why a 16 tooth front sprocket?

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I'm new to the game and trying to learn as much as possible. Why a 16 tooth front sprocket?

It's just a preference for what kind of riding you are doing. The stock 15/45 works well for 50/50 riding which I do ; however, there are times when I am doing a total street ride and the 16 I'm hoping will cut down on rpms on the highway, and thus the vibes, and give me a little more pleasant ride. I have 2 sets of rims, so I'm thinking of setting 16/45 for commuting to work during the week , and then popping my dirt wheel on with 16/47 for dual sporting. Not sure if the chain will adapt to 16/47 easily though, that's a bit longer than stock. Heck, even just changing the coutershaft sprocket on the trail would be easy enough -- unlike say, the KLR sprocket, lol.

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