|
|
Post by veg on Sept 4, 2018 17:45:49 GMT 1
Can anyone tell me the width of a standard rear sprocket? I am just getting the bike finished prior to going to daves for set up and ordered a std o ring chain from norbo. It fits beautifully around the front sprocket as it should as it is standard. However the rear sprocket seems considerably narrower this is supplied by NK as it’s a one off for the rear wheel. I have measured the front sprocket it’s 9.4 mm wide the rear is only 6.4 mm wide I am guessing it’s for a narrower ‘lighter’ chain.
Tia
|
|
|
|
Post by stusco on Sept 4, 2018 17:51:52 GMT 1
Can anyone tell me the width of a standard rear sprocket? I am just getting the bike finished prior to going to daves for set up and ordered a std o ring chain from norbo. It fits beautifully around the front sprocket as it should as it is standard. However the rear sprocket seems considerably narrower this is supplied by NK as it’s a one off for the rear wheel. I have measured the front sprocket it’s 9.4 mm wide the rear is only 6.4 mm wide I am guessing it’s for a narrower ‘lighter’ chain. Tia What bike |
|
|
|
Post by veg on Sept 4, 2018 17:54:43 GMT 1
Mine 😀
It’s my 4lo special with mt125 magnesium wheels but he knows the bike and knows it’s a 4lo bottom end
|
|
|
|
Post by stusco on Sept 4, 2018 17:58:04 GMT 1
9mm on my 4l0
|
|
|
|
Post by steven on Sept 4, 2018 18:01:17 GMT 1
... as above, my standard 4L0 rear sprocket measures 8.91 mm or 0.350"
Steven.
|
|
|
|
Post by jon on Sept 4, 2018 18:31:32 GMT 1
Sounds like a standard 4LO 530 front and a YPVS 520 sprocket.
Jon
|
|
|
|
Post by oldelsieboy on Sept 4, 2018 18:33:54 GMT 1
|
|
|
|
Post by veg on Sept 4, 2018 18:44:41 GMT 1
Bollocks bollocks bollocks. Thanks chaps I did wonder if it was a 520. So I now have to decide a new chain and altered front sprocket or wait months for NK to make a new one . This build is bloody fighting me at every bloody corner.
Thanks again chaps 👍
|
|
|
|
Post by cb250g5 on Sept 4, 2018 18:45:35 GMT 1
Chains are imperial.
EG a 530 chain
The "5" is 5/8 inch pitch
The "30" is 3/8 inch width.
etc.
|
|
|
|
Post by veg on Sept 4, 2018 18:50:53 GMT 1
Well I have pinged an email to NK and will await his response.
|
|
|
|
Post by veg on Sept 4, 2018 18:53:03 GMT 1
Chains are imperial. EG a 530 chain The "5" is 5/8 inch pitch The "30" is 3/8 inch width. etc. Of course so even if I skim the std sprocket down to 6.3mm the actual pitch between teeth will be different and cause problems if I run a 520 chain as the rollers aren’t the same? That’s right isn’t it? Forget this I have just read oeb post that negates this argument 👍 |
|
|
|
Post by veg on Sept 4, 2018 20:14:48 GMT 1
Ok this is the response from NK, so it appears I can have a std ypvs front sprocket but it needs a spacer to fit the 4LO? That correct?
"Tim
The front sprocket you will need is a standard ypvs front all the 350s after the 4L0 ran 520 chains. They are much lighter and give more clearance. Your quickest solution is a ypvs front sprocket. A ypvs sprocket spacer and a 520 chain I can have all that here for you Thursday. If you want a 530 rear sprocket making that will be a week or 2 to order in the blank and get it cut on the cnc
Let me know what you want to do. And if you want me to sort a chain sprocket and spacer let me know how many links for the chain
Nigel"
|
|
|
|
Post by muttsnuts on Sept 4, 2018 20:55:35 GMT 1
yep, get a ypvs front sprocket and ypvs front sprocket spacer, that will solve the problem, if not, I have them here anyway  |
|
|
|
Post by veg on Sept 4, 2018 21:20:35 GMT 1
So basically Dave I don’t need to worry about it. Cheers mate 👍
|
|
|
|
Post by muttsnuts on Sept 5, 2018 9:09:25 GMT 1
ok, I'll sort some out and put to one side for you
|
|
|
|
Post by 4l04ever on Sept 5, 2018 20:59:03 GMT 1
If your sprockets are lined up on the inside faces, you will need to keep the front sprocket spacer you currently have fitted.
|
|
|
|
Post by Tobyjugs on Sept 5, 2018 22:04:34 GMT 1
Rob is right, and you might need a small spacer on the outside of the sprocket to take up the slack for your shouldered nut.
|
|
|
|
Post by 4l04ever on Sept 5, 2018 22:33:50 GMT 1
I have run a 520 sprocket on an LC with the LC spacer and the nut still fitted okay.
|
|
|
|
Post by veg on Sept 5, 2018 22:37:52 GMT 1
Thanks chaps NK said he had done it so that it runs a 520 chain and ypvs sprocket shame he didn’t tell me as I now have a brand new front sprocket and o ring chain that are 530. Dave is going to sort sprocket and chain when it goes for finishing the wiring and dyno set up
|
|
|
|
Post by JonW on Sept 5, 2018 23:46:20 GMT 1
If your sprockets are lined up on the inside faces, you will need to keep the front sprocket spacer you currently have fitted. I have run a 520 sprocket on an LC with the LC spacer and the nut still fitted okay. I agree Rob. Both the inside mating surfaces are in line, hence no matter which sprocket was fitted they would still be in line... The difference in width is minimal, hence the LC nut still works as designed due t the tolerances in the length of the thread I guess. |
|
|
|
Post by bare on Sept 8, 2018 3:39:10 GMT 1
It's only an issue when fitting a YPVS engine into an lc chassis.
Then the running out of threads on the output shaft /sprocket is a problem.
|
|
