I doubt that there's room enough for a 13 T sprocket, even a 12 might come to close to the flywheel cover.
My 300RR came with an S3 36T rear sprocket, might be a better idea, or a 38 which is readily available.
No, the fuel doesn't spill out because no fuel line is opened. You have to remove the complete injector with the fuel tank.
Due to the new lay-out of the fuel line, you have to remove the breather hose from the valve cover.
The rest is described here:
http://montesa4rt.nl/data/2016_300RR_kit_300RR.pdf
http://montesa4rt.nl/data/2016_300RR_kit_full_power.pdf
The things I did when I got my 300RR
- mount case saver, waterpump and coil cover
- change rear sprocket for a 43T (best use a half chain link)
- Change rear brake disc for a Galfer one
- ad water resistant grease to link, wheel and steering head bearings
follow the instructions in the manual for running in.
Enjoy!
I wonder how the 300RR is gonna cope when it gets hot this summer.
It's only 12°C outside, and the fan already kicks in every 20 seconds.
Big radiator from H&D Racing might be a good idea?
Nope, it turned out to be a bad crank shaft and gearbox bearing, to much play in the big end and the piston play was at the max. limit.
http://www.trialscentral.com/forums/topic/57939-rebuilding-my-bultaco-159-engine/
