Chain and sprockets

[bigtwinthing]

hi what do i need to have a bit more acceleration and a slight loss of top end? 1 off the front and 2 up on the back? and will the standard chain fit this ratio if a buy all new sprockets? ( i already have a new spare chain, so just need the sprockets! ) any help pls.

[Pete.L]

That will do it and the chain will still fit at the std length.
Personally, I just went for the +2 on the rear and that was more than enough for power wheelies in second. Two up riding was a hoot and I could hardly keep the front wheel on the floor. Best Mod for the money in my book

Pete.l

[sirch345]

I agree with Pete, + 2 on the rear is good, plus the bike won't be revving it's nuts off when riding down the motorway or dual carriageway. As Pete says the standard chain will fit, but will mean the rear wheel is pushed almost as far forward as it will go in the swingarm. Iirc you need a Honda CBR900 Hornet sprocket (43 teeth).

Chris.

[VTRDark]

Don't forget your Speedo will be out of whack so you need a Speedo heeler if you want accuracy. Why not go -1 fr +1 rear, keep the chain at the same angles as now as it spins around the sprockets. Less wear and tear.

(:-})

[sirch345]

Don't forget your Speedo will be out of whack so you need a Speedo heeler if you want accuracy. Why not go -1 fr +1 rear, keep the chain at the same angles as now as it spins around the sprockets. Less wear and tear.

(:-})

When you start to reduce the front sprocket in diameter by going with less teeth you make the chain work harder as it has to turn in a tighter circle/radious, so IMHO you end up shortening the chains life.

A good point about the speedo being out,

Chris.

[VTRDark]

I thought by changing the angle that the chain hits the teeth on the sprocket is what add's faster wear. So if the chain comes around at a higher angle, a more diagonal approach to land on the sprocket teeth then it catches the sprocket higher up the tooth where there is less material. I may be wrong but then I can see the logic with a smaller radius as well as it has a tighter turn.

Oh well, we all know there is going to be a compromise somewhere when we go changing things from standard. The question one has to ask, do the benefits out weigh the negatives. Or are we willing to live with the negatives for the sake of the positives

(:-})

[sirch345]

I thought by changing the angle that the chain hits the teeth on the sprocket is what add's faster wear. So if the chain comes around at a higher angle, a more diagonal approach to land on the sprocket teeth then it catches the sprocket higher up the tooth where there is less material.

I can see what you mean about that as well, perhaps what we need then is a Harley Davidson belt conversion he runs and takes cover from the fall-out of such a suggestion

Chris.

[MacV2]

Found these for you Sirch...



Will these do for you...

[Jamoi]

Or an alternative to braces...

I don't think the angle of the chain as it hits the sprocket will affect wear, as the chain comes into contact in theory at the same speed and angle however you have it, due to the sprocket being a constant circular radius.

What sort of top speed are we looking at by adding 2 teeth to the rear?

[VTRDark]

Here's a useful link http://www.gearingcommander.com//



(:-})

[Jamoi]

Hey that's a cool calculator! I forget these bikes can actually hit the limiters in 6th, so that would give a pretty accurate figure.

[bigtwinthing]

cheers Guys i will try 2 up at the back to start so thats a 43 tooth sprocket and it should fit the original chain ( i have a new standard one ) ?

Very helpful guys on here cheers.

[Jamoi]

Good man, be sure to report back to give us your opinion on how you like it, or not whichever the case may be.

[sirch345]

Found these for you Sirch...



Will these do for you...

Perfick Mac

Chris.

[bigtwinthing]

has anybody used "Talon" aluminium rear sprockets before!!! i have a 43 tooth Gold (yuk) rear sprocket to try? any idea what there like??