the 3tj i've got for the road has got a 520 chain, am i right in thinking standard is 428? is there any benefit for the road in having the 520 as the rear sprocket is pretty much dead so i'm going to do chain and sprockets together. its 14f 46 rear at the min.

any suggestions?

cheers
taggy

428 is lighter so the unsprung weight is reduced but a 520 will last a lot longer

Swings and roundabouts really

most road bikes 250cc upwards come standard with a 525 pitch chain and sprockets very few come with 520 and some 530 picth most racers will convert to 520 as its easier 2 get different sizes of sprockets in that size etc...

428 is o.e is it not?
already got 520 on the race bikes so i guess i'll go 520 a spare will be useful if i go for that!
cheers all.

it may be im not sure 2 be honest but i have a 415 picth chain here off a 125 race bike so 428 wouldnt be much bigger than the 415 and i think it would be very small for it 2 be on a 400 i would say standard would probley be 525 most 125cc bikes come with a 520 or a 520 so i couldnt see a 400 coming with a 428.

520 would be your best bet.

428 is standard - it's done to save weight

never new that tbh, the road 3tj's ive bought had a 520 set up on them and the race bike again 520 most/all other 400' are 525 or 530

How do you find out what size the chain is, is it stamped on the side plate or is there a way of measuring it?

it should be stamped periodically on the side of the chain

aye check some of the links on the chain most of them say the pitch or check around the sprocket it should also say it tho not every sprocket dose.