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[Tim NZ]

Do check with 'mechanic' but if s/he was not able to get it running correctly, then s/he is probably the last person on earth I would want fiddling with it now?

[Tim NZ]

TYPO alert: CW not CCW.


dyslexia rules KO?

[Bullet Whisperer]

I don't know if that makes me one of those 'misguided tuners', but I have retarded many an inlet cam by 1 tooth, to get excellent results. Maybe a bit pointless with the standard compression ratio, but last time I did it, there was an overall gain of 1 bhp, with an extra 5 bhp to play with right at the top end. But what would I know? ... https://www.youtube.com/watch?v=S2Hr2ORFFrg

[Tim NZ]

Having on too many occasions discovered (clocked) extreme cam timing variations in the pre 2000 Bullets, with inlet lift peaks located between 98 and 113 degrees ATDC, with similar disparity at closing point. Blindly retarding any cam by one tooth, without having first measured is foolhardy.


And dont naively believe the advertised timing figures either; I have come across motors with two inlet profiles.


The better way to make a Bullet respond to camming on the cheap is to swap the cams about and fit an exhaust profile to the inlet. But first, you HAVE to check the cams. Or you could be pushing poo up a hill with a pointy stick.

[Bullet Whisperer]

Tim, I DO actually know a thing or two about engines and how to build and time them and am not some blind, naïve muppet which came down with the last shower. There is too much bulls*it around about how critical everything has to be set up on these engines for them to even work, never mind work properly and everyone has to be or consult some sort of expert to be able to work on one. I admit some people shouldn't be allowed to own tools, but I assure you I am not one of them. NO HARM will come to any Bullet by retarding the inlet cam by 1 tooth [yes I know it is 18 degrees and I know about possible variations from engine to engine] and it is probably less time consuming than b*ggering about trying to clock the timing in any case. If it goes faster with the cam retarded and you're happy with it, leave it there. If not, put it back the way it was, you will still be done sooner than messing about with a degree disc and a dial indicator - both of which I use on occasions to check valve timings when necessary, by the way.

[Bullet Whisperer]

Getting back to the original question about the Boyer, is it possible the two wires from the stator are crossed - I saw this on a Trident once, where the black and white and black and yellow wires were crossed under the seat and the engine was on full advance at starting and low speeds and it retarded as the revs went up, but spluttered and banged as if it was totally shot. Swapping the wires over cured it. Might be worth a look? Regards, Paul.

[papasmurf]

Bullet Whisperer " I admit some people shouldn't be allowed to own tools," ........... Ain't that the truth. I have a friend who is brilliant at engineering theory and problem solving, but I would not let him near a spanner, ever.

[PeteF]

Too true Papa, a friend of mine has qualifications a mile long and worked for Ford in engine development all his life.

I have to service his lawnmower!!

[papasmurf]

[scotty]

A ring boyer there in england will give you the good oil
B look in tech notes on site
C have a go yourself , set to tdc anystroke boyer runs a wasted spark, ma rk rotor stator at tdc with fine point texta pen then mark 32 degrees btdc on rotor, coil plate to the left magnet should be level with start of pin I mark pin location on plastic coil disk easy to see. You need a strobe timing light start bike with plate mid point in slots run bike half throttle look with timing light if 32 degree mark dont line up rotate plate if you need more adjustment slacknd centre bolt on dizzy to loosen rotor tap it a little way round tighten if worse repeat going the other way till marks line up object is to get marks aligned with coil plate in mid position, this gives you option to fine tune on road
Sounds a bit fussy but once set no need to touch it for a while, way better than points, have a go not that hard.