I know it's one of the others but here's me back in 86 I think. Standard race issue gas board waterproofs. Those were the days...bought whole frame and forks already sprayed for £10 from a guy called Stuart Westmorland from Leeds central. At least I have trophy for my efforts.
I felt for Tony at Cadwell. I once borrowed money to get to Lydden drove through the night 7 hours, two hours sleep. One practice session. First race and bike seized (someone forgot to put needle clip on properly!!!) at first corner. Three weeks wages for 100 yrds.
Here's a collage I did back in 84. Taken from the Scooterist mag that Norrie did at the time.
Alright Col hows tricks mate? I was over Rays on Friday meself talking to Steve. Yeah just had another little financial burden so far too grown up and sensible to be bonkers more slightly rebellious and a bit fat. Found me way onto here by a very tenuous route but thats another story......
I am in need of some expertiese, I have this old 1964 smallframe 90cc that was found in a barn in Logan, Utah. I purchased it for $750 in April 2011. The motor turned freely, I changed the cables, created a wiring harness, had the gas tank re-done professionally and changed the oil and it ran. Everything was stock on it.
After a while I needed a bit more power so I ordered a Polini Pipe for it(never rejetted it) with the original 16/16 del 'orto Carb. I new nothing of jetting at this juncture. Anywho, I needed way more power.
To keep a long story short, and save me from telling you of about 4 engine rebuilds and one major seize due to a wrist pin bearing going out, I think I got it now.
I have 1974 125cc Primavera case (ported) malossi 136 cylinder with a high compression head, port matched cases, full circle mazuchelli crank, piston ported reed induction intake, dellorto PHBL 25mm carb, 68/29 gearing ratio, ET3 electronic ignition, ducati CDI, HP4 flywheel and Malossi Power Exhaust.
Its jetted now and pretty fast for me. What do you experienced racing guys think of this setup and what would you do or would not do next with this scooter?
1964 Vespa Smallframe 90cc 125cc Primavera engine. Ported malossi 136 cylinder with a high compression head, port matched cases, full circle mazuchelli crank, piston ported reed induction intake, dellorto PHBL 25mm carb, 68/29 gearing ratio, ET3 electronic ignition, ducati CDI and an HP4 flywheel.
I'd say we're talking about 14 BHP there. That's a fairly basic 90ies road setup which worked alright back in the day. At present competitive race bikes make around 30-35 BHP or so, roadbikes are easily over 20. The difference in performance is about as huge as the difference in money. If you want more power the next steps would be getting the port timing of the barrel right, making the exhaust port in particular larger, changing it's shape, binning the carb and the pipe, replacing them with something slightly more sophisticated. From now on it's either parting with huge amounts of cash, or parting with slightly smaller amounts of cash and gathering know how. Taffspeed's saying "how fast can you afford to go" is quite possibly the only tuning related relic from the 90ies that is still as up to date as it was back then.