markm85

Hi, I hope some of you more knowledgeable Bultaco owners can help. i have a model 90 that has been fully rebuilt and it’s fitted with 36mm Mikuni carburetor and new electronic ignition. Its an absolute pig to start, but when started the motor sounds strong and will happily rev to 6000 and will tick over, but when riding on the road the engine runs very erratically and will not push through 5000 revs. The engine after 1-2 miles will start to misfire and run really badly. I have changed the main jet, pilot jet and needle with no joy. I now wondering if I have a dodgy ignition system ? Any advice? thanks Mark

Hi Ron, thanks for looking. BR Mark

Hi, I am currently looking for a Femsa flywheel, does anyone know where I can get one or who has a spare they would like to sell, I don’t really care from what model. I am based in the UK so would prefer to purchase from within country. Thanks Mark

Just finished this project.

Hi, thank for the comments. The dome thing, is a watch mount with magnifier lens, Matador's Mk 4 and 5 had them as standard. Saves looking at my watch!!

Finally finish the bike just waiting for a MOT and then register it, then ride it!

Hi Larry, That looks really good. Regarding clutch arms, it's around 75mm between the centers is that too long? R Mark

Working hard to complete my Alpina, need to find out if it will spark. Then I'll finish off the exhaust system. Thanks for all the advice I have received.

Lorenzo, Many thanks for the comments. The tank was done by a local sprayer who was recommended to me by someone who restores Morgan's to show standards and he uses him for all his paint jobs. The guy was a perfectionist he even sourced the original blue and yellow paint codes for me, the yellow line was painted not a tape. He repainted the blue twice as he was not happy with his first effort ! Plus the cost was very reasonable for the amount of work he put in it, he was well below what bike sprayers quoted me. Yes, the bike currently lives in my daughters bedroom she's at university so not many complaints so far ! Mark

Guys, Many thanks for all your replies it's been of great help, particularly as I'm a novice to Bultacos! Regards Mark

Hi, Thanks for trying. Just sent my address and an alternative hope it gets through. I will reply if I receive it. Thanks Mark

Hi, I'm going to wire my bike but very confused with the wiring diagrams in the manuals as they all look slightly different! I have three wires coming out of the engine; green, yellow and black, many of the diagrams show four wires, so what's correct? Has anyone a definitive diagram or has re-wired a M85. Thanks for your help.

Hi Philip, Mine has three fixing points, one on the top frame and two on the rear. See pictures hope this helps? Mark

Can anyone advise the best way of removing a old copper gasket mine seems to be really stuck in?

Good job, looks really great. I hope when I finish my project it looks that good.