Vintage BMW Motorcycle Owners

Update - John Lawes of BEMW here in the UK has stripped the engine down to find that one of the pistons had a ring missing and one had a broken ring and the engine had no oil filiter in place as well as the small end's nipped up too tight. So it seems like I had a lucky escape and made the correct c...

Hi Ian, I'm down south in Surrey. Its been a steep learning curve with the R12's. The first (grey) I bought as a non runner without much knowledge and research before hand. I had the mag/dyno rebuilt to give me the confidence that I had a reasonable spark and then found out that the taper on the cra...

Hi all, Tale of two R12's: Grey 1940 - The choke I ordered for the Sum arrived with a new gasket set. Having taken the carb off I found it pretty messy inside and the idle jet in the wrong hole. Having cleaned the carb out thoroughly, put the jets in the right holes, replaced the gaskets, installed ...

Darryl,

I've found a replacement for the bolt on ebay and will fit that when it arrives. Once again many thanks for your help.

I'll post an update this weekend.

Regards

John

Thanks Darryl, I'll try, unfortunately only one of the bikes has this on the carb, the other has just a bolt in its place. Do you think this is an obstacle to it starting even when hot?

Regards

John

Hello all, I have two single carb R12's, both have starting problems (or I have problems starting them). Yesterday I spent at least a hour or two trying to kick start them (my right leg is now twice as big as my left leg). I tickled the carbs, cleaned out the carbs, checked fuel flows, fresh fuel, c...