, any photos of actual front-sprocket on your bike?
I think he may have gotten mixed up by this thread:
[br]Since I did this conversion, alot of people have been asking me about where to buy the sprockets, how much, is it worth doing.. etc etc. So I thought I'd do a write up which can answer all the questions people might have in reguards to it, and include a walkthrough into how it may be done...
This is complete 520 conversion using:
- 14t single big-bolt front-sprocket from VTR250
- 53t rear sprocket from dirt-bike
- any 520 chain, 120-links
I think he got confused by "428" part# of rear-sprocket, even though it's 520 chain-pitch. Then he started looking for 14t front-sprockets for CBR250 line, and it was only available as 2-bolt sprockets from earlier (H) generation. Which he didn't realise was 520 pitch only. Well, any 14t front sprocket for these bikes will be 520, either 2-bolt for CBR250 or single big-bolt for VTR250.
In summary, to get 14t front-sprocket, it's complete 520 conversion needed with 520 rear-sprocket and 520 chain as well.
Here's 53t 520 rear sprocket from dirt-bike. "428" in part# DOES NOT refer to 428 chain-pitch