I have noticed that my R27 is now backfiring when I close the throttle and the chrome exhaust header pipe is turing blue. I recall that these are related to...
Jeff, Also a sign of lean fuel mixture. Try turning the idle mixture screw in (clockwise) 1/4 turn. You'll probably have to adjust the idle speed then, but...
... I can't imagine that it is backfiring. My R27s have only backfired once in decades - it was recently and it was from trying to start it with the timing set...
I forgot to mention checking the intake spigot flange. They've been known to warp or loosen. A vacuum leak will lean it out through the entire RPM range. Kim...
Mine is finally running but backfiring out the carb. Idles Ok, but that's about it. Question on the jet needle, it says mount at position two. Does one count...
I'm starting to find some answers. The fellow at bing was very helpful. Looks like I may have mixed carb slides up. I have R50,r50S,R60,r69S and R27 carb parts...
Hello, First I need to say I don't know anything about R25's. I just bought what I beleive is an R25 cylinder head (ebay). Like a bonehead, I looked at photos...
Hello Kim, Value depends partly on what remains to be done to the head. Also, which model is it for? The real value is what someone is willing to pay for it. ...
Hello again, Thanks for the info. If anybody wants or needs it, I'll sell it for what I paid ($250), or if it's likely to be sought, I'll hang on to it and...
I need to get my drive shaft and flange of my R25 re-chromed. So I need to get them separated using a big press. Will any proper machine shop be able to do...
Hello Marco, Where do you live? I have a special tool to hold the flange in a press, and another called a drift to force the shaft out of the coupling. This...
Thanks for the offer but I live in Southampton in the UK, although I have plenty of friends living in Ohio (Cleveland and Columbus). So it will probably be...
Marco, Would you like dimensions for the tools? They are easily made. You will especially need the tool to reassemble the DS, in order to keep from damaging...
Hello All, After being on the list for a while and looking for the right bike, I finally bought the bike from a well respected friend of mine who has been a...
Richard will the tools you mentioned for the single work on the drive shaft of the R51/3 twin if they will I would really appreciate getting the dimensions for...
Hello Peter, the tool will work, except that the two holes need to be at least .25 mm larger than the OD of the two driveshaft parts. I can change the...
Richard much appreciated I should be able to change the drawings so would like to get dimensions of what you have I hope it is not too much trouble to post to...
Hi, I have a problem that is driving me crazy. I'm hoping someone has seen something similiar and can give me some advice. I have a R25/3 which I just recently...
Robert, let's start with the following: there are no stupid questions and a dummy spends his or her live in a crash test car... Do you have something to...
Hello everyone I just became the owner of a 1967(I think)BMW R27. I've had a lot of Beemers but this is the first single. I would like to try to restore it to...
Jack, There are two people I would recommend to you for the exhaust thread repair: Randy Long also installs replacement seats and guides. They both handle fin ...
... I recently converted my R27 to 12V, and have three 6V regulators of which I only need to keep one. There is an unopened NOS mechanical, an opened NOS...
Hello R24 Owners, A neat discovery: R25 rims will lace up to R24 hubs. Yeah? So what? you ask. The two rims have different lacing patterns. The spoke holes in...
Ben, I did so once, by removing the wheel and turning back the "cardan clock" so that you can bow the fixing of the shaft. You should than be able to remove ...
