I need to replace chain and sprockets after a chain break. I was thinking I might fit a 16 tooth sprocket on the front for more top end speed. Does anyone know if this will fit in the sprocket cover without fouling, how many links would I need in the chain, and would the loss in acceleration be that noticeable. Any help/advice would be appreciated

so is that just one more tooth? if so it wont make too much difference, and you can use the same length chain as you are right now, It's prbably a good idea anyhow living in Norfolk...seeing as it's all flat

keep it lubed though or it might break again!

I think its 2 more teeth without checking the manual, ebay sellers are saying 14 is standard

2 more teeth equates to 14% increase in top speed and of course with a little 125 you will notice a bit less pulling power, it should go behind the casing ok though but you may struggle against a headwind / hill etc, or you could play safe and go for just 1 tooth more than you have right now...It's your call really

See what you are saying but then it is a bit of a struggle sometimes anyway LOL. Will give it some thought before making decision

It would be a good idea to count the teeth you have (not yours) right now,,,how can you make a decision until you know this?

Good point, will have to do that

I'm almost ready for sprocket and chain change myself - I only have one more notch left to tighten it all up! I was thinking about changing the rear for one with less teeth - again to increase the top end. Also in flat lands (Essex) Airhead so not too worried about accelerating up too many hills!

If you do change the number of teeth I'd be interested in how much difference you notice. Cheers!

I'm almost ready for sprocket and chain change myself - I only have one more notch left to tighten it all up! I was thinking about changing the rear for one with less teeth - again to increase the top end. Also in flat lands (Essex) Airhead so not too worried about accelerating up too many hills!

If you do change the number of teeth I'd be interested in how much difference you notice. Cheers!

one less tooth on the back wil make sod all difference Anrew, better to add one to the front

Cool! Cheers for that. I saw one on eBay with 4 or 5 less teeth. I'll keep an eye out for front ones with a couple more. That's why I joined this forum. Always someone who knows what they're talking about! Happy New Year y'all