Author Topic: b.s.a m33  (Read 3892 times)

Offline watcycle mechanical

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b.s.a m33
« on: April 23, 2010, 03:18:12 PM »
Im new around here so please be patient with me Im barely computer literate what Im looking for is some assistance to get an m33 which  i have just finished a nuts & bolts restoration on but unfortunately no matter what I do I cant get this cantancress beast to start & run as It should Ive set the valve timeing up as per the workshop manual I have dots & dashes on cams lined up with coresponding marks on intermediate gear ignition timeing set at 3/8 b.t.d.c it starts but only after a lot of kicking then it responds to throttle but only runs for a couple of minutes before dieing & refuseing to start again without going through the whole process of checking valve & ignition timeing again no matter what specs I try useing starting with one or to kicks eludes me it seems like the few times it has started were only flukes some body help me Imalmost ready to give the trade away & take up knitting regards. Geoff frustrated bike tech

Offline Goldy

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Re: b.s.a m33
« Reply #1 on: April 23, 2010, 07:02:46 PM »
As you say this sort of thing is very frustrating and if you have completed a nut and bolt restoration it can be many things. If you have had it running then it would not seem to be anything major and I would not have thought it to be valve timing. I would check the points gap and ignition timing. I would check the spark by removing the plug and earth it to the engine and make sure you have a good fat spark. I would then turn my attention to the fuel side. Make sure that there is a good flow of fuel, check float level is correct and carb adjustments. Check there is no air leak between the carb and engine, this can be caused by overtighteneing as well as undertighteneing. Dont give up, you will find plenty of advise on this forum and just keep in mind when you ride off for the first time that sound will be a joy. all the best.

Offline bikerisme

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Re: b.s.a m33
« Reply #2 on: April 29, 2010, 11:07:08 PM »
HI JUST REPLYED TO YOUR OTHER THREAD AGREE WITH LAST ANSWER DONT GIVE UP IF YOU DO I WILL BUY IT OFF YOU!!!!

Offline watcycle mechanical

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Re: b.s.a m33
« Reply #3 on: April 30, 2010, 08:06:08 AM »
I dont give up on any of my customers machines let alone sell them I have no desire to be veiwing the world from behind bars

Offline watcycle mechanical

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Re: b.s.a m33
« Reply #4 on: May 03, 2010, 10:12:07 AM »
finaly it lives & my sanity has been restored well as near to normal as a 58 yr old motorcycle tech can be too much shell A & methanol I guess any way after checking & rechecking everything more times than Im prepared to count are but succeshas a very sweat taste O.K enough of me doin the happy dance I guess you want to know wat was stopping the old girl from makeing go noises. It was a fuel issue but not what you would expect it was the tank or should I say the cream lineing treatment that had been applied by the previous owner in burma so Lord only knows what it was maybe egg whites milk & 1/2 a cup of flour who knows but any way what ever it was it was breaking down & contaminating the fuel to the point where it had nill volatility. Clean tank thoroughly fresh 98 ron fuel  depress tickler valve flood liberaly 25% advance full choke decomp lever applied 3-4 vigorous kicks till she popped in the exhaust decomp out push down on kick star till she sighs through the carby & kick swiftly phwump phwump phwump phwump. I'll put the finishing touches on her in the morning & should be test rideing around lunch time thanks for all the good advice along the way mostly thanks for the encouragement its been appreciated see you some where on the road if your in oz or talk to yo back here.Regards Geoff