Been a while since I last asked for some advice on my upgrade, with gearbox on bike...I was awaiting some parts....new bushings and a 2nd mainshaft gear. Got the gearbox put together and yesterday was the big test ride. Also, new carb jets and needles were installed. After 10 months bike started first kick, idle is much improved. After a warmup, shift into 1st was smooth, bike pulls really well. All shifts were butter smooth. I use, and highly recommend, Redline Heavy Shock Proof gear lube, and I top up with 1 Imperial pint in the gearbox, as suggested by Mick Hemmings, as stated in a written article somewhere. If I had known which parts needed replacing, the job would have went a lot quicker, but as far as the labour, it is a pretty easy upgrade....I am very pleased with the results