Whats it all about ?????

Over 30 years of buying, breaking, building, cutting, welding, riding and selling greasy old mo'sickles. Bare bones bikes from the middle of nowhere!

Saturday, 16 August 2008

on to the Dyno

I rode Blackbob out to the Dyno centre, not running great, felt a bit strangled, so after the Dyno guy's initial shock at the bike (kinda getting used to that ) we got it up on the dyno and gave it a first run, up into 3rd gear (weird feeling doing 60 mph in a 10ft x 10ft room on a bench ) the lamda sensor was showing that at half throttle the carb was too rich and at full throttle way too lean so I pulled the carb and lifted the needle by a couple of notches. fired up again and up into 3rd again, half throttle and suddenly the engine note changed, down oin one cylinder - cut the mag and checked the pugs, lh cylinder sooted up. We checked the spark - fine on both cylinders, fired up again still only the RH cylinder, pulled off the LH rocker inspection covers inlet pushrod has snapped - BASTARD

Got the bob back to the shed with the trailer - pulled the rockerbox off and ive got one snapped and one bent inlet pushrods no stuck valves and nothing to hint at what might have caused it - so it looks lke i'll have to strip the whole motor down again

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