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Post by scooter on Jun 19, 2020 19:24:20 GMT 1
im going to use a 150 rear tyre in my lc with lc engine and need to know what you guys use for a front sprocket is it standard spacer and all offset sprocket or is it ypvs spacer and slightly less off set sprocket also can you turn a spacer to you own width and if so whats the max before you run out of thread on the output shaft cheers for now
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Post by dusty350 on Jun 19, 2020 19:38:26 GMT 1
They can all differ slightly to be honest, so I would get your rear wheel in and straight, and then run a straight edge, clamped to the outer face of the rear sprocket, up to the front sprocket, and measure the offset. Then you can decide more accurately what you need regards offset/sprocket spacer. I think the last one I did have a 5mm offset front sprocket. You need the chain to clear both the tyre and the frame obviously, and I've had different measurements on different bikes ! Dusty
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Post by scooter on Jun 19, 2020 20:04:40 GMT 1
cheers dusty just waiting for swingarm at the moment try to get a step or 2 head for parts ive got a rear wheel that uses a 520 chain and the sprocket has the same amount of teeth, i think the sprocket carrier will need machining down so something else to measure when the wheels in
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Post by dusty350 on Jun 19, 2020 20:17:35 GMT 1
Yea, that is another option, depending where you need the chain to run. When I've used Rgv wheels in the past I have never needed to mod the sprocket carrier and have achieved an even gap between chain and inside edge of the frame, and chain and outside edge of the tyre, but it is close ! 2 different bikes with the same set up used different sized offset sprockets !! That's why it's worth seeing exactly what yours will need Dusty
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Post by Tobyjugs on Jun 19, 2020 20:41:07 GMT 1
im going to use a 150 rear tyre in my lc with lc engine and need to know what you guys use for a front sprocket is it standard spacer and all offset sprocket or is it ypvs spacer and slightly less off set sprocket also can you turn a spacer to you own width and if so whats the max before you run out of thread on the output shaft cheers for now Hi Scooter, determine the offset needed using your original sprocket and spacer. Get in touch with VVM Racing in Holland. He will make you an offset sprocket that will fit your set up and including postage it will be much cheaper than Talon for example. He has made me a front sprocket with an extreme offset of 24mm which Talon wouldn't make and it cost me 70 euro's. Prices might have changed since then but his work was excellent and i think he deserves a shout for it.
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Post by scooter on Jun 19, 2020 20:45:25 GMT 1
cheers tobyjugs have just bookmarked there page many thanks did you get yours heatreated
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Post by scooter on Jun 19, 2020 20:48:44 GMT 1
thinking of using a h/d no o ring chain to keep width down any suggestions on this from those already done this
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Post by Tobyjugs on Jun 19, 2020 20:50:46 GMT 1
Yes i did get it heat treated, He is a one man show and the best way to get in touch with him is via Watts App. Marrcel from this forum suggested i contact him so it's a big thumbs up for Marrcel
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Post by Tobyjugs on Jun 19, 2020 20:54:32 GMT 1
I used a motocross 520 chain on my Bakker 443 project. It's only had a few dyno runs so i can't remark on it yet.
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Post by Tobyjugs on Jun 19, 2020 22:23:06 GMT 1
I just had a thought. If you are using a 4LO engine casing do you have enough room for the offset sprocket? Will the sprocket hit your clutch mechanism?
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Post by scooter on Jun 20, 2020 8:27:44 GMT 1
hadnt thought of that will have to check
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Post by dusty350 on Jun 20, 2020 9:06:49 GMT 1
You will be limited, but I think you can still go with a fairly big offset. I cant remember what offset this sprocket was - I didn't need to use the one in the pic, it was just fitted temporarily; 26268070179_48849d8c80_k[1] by dusty miller, on Flickr It's not the best angle to gauge it, but you can see that the offset will put the chain nearer the mechanism inside the casing. Dusty
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Post by headcoats on Jun 20, 2020 9:18:47 GMT 1
Dusty the big nut on the flywheel. is it off a TZ ? I have one on the bike but forgot what it was :-(
Do you have a link or part number please
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Post by dusty350 on Jun 20, 2020 9:45:56 GMT 1
I don't know if it's anything other than a standard Lc flywheel nut ? It was with the engine when I originally got it. Yamaha part number for a flywheel retaining nut is 90170 12067 Dusty
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Post by dusty350 on Jun 20, 2020 9:53:27 GMT 1
Had a thought, and took a pic of my 400 engine which is on the bench. The design of the clutch actuator is virtually the same as the Lc. Although I cant definitely say there is as much room inside the Lc casing (I haven't got an Lc engine here to check) I don't imagine it's much different; 20200620_090436 by dusty miller, on Flickr Looks like you should be ok Dusty
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Post by scooter on Jun 20, 2020 10:12:43 GMT 1
Looks like quite a bit of room in there
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Post by badger1 on Jun 20, 2020 10:45:52 GMT 1
Your be more limited by the frame if you have to go to off set. Funny how some bikes with the same set up need a different offset.
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Post by JonW on Jun 20, 2020 13:55:16 GMT 1
Martin Dusty is right, thats a normal LC nut.
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