Art Posted June 28, 2018 Report Share Posted June 28, 2018 Hey every body! I'm new here and new to owning a bultaco. How can u find out the year of it? And I would sure love some help trying to get this thing to run... I havent heard it run yet. I bought it for $40 so I figured it was worth that running or not. Thanks art Quote Link to comment Share on other sites More sharing options...
Art Posted June 28, 2018 Author Report Share Posted June 28, 2018 Can u tell me what it might be why it wont start i got spark and gas comes out of plunger on carb but it wont even try to start not even with starting fluid Quote Link to comment Share on other sites More sharing options...
b40rt Posted June 28, 2018 Report Share Posted June 28, 2018 Try a new (correct) spark plug. Is old plug wet or dry ? Timing out, does it cough / kick ? Quote Link to comment Share on other sites More sharing options...
Art Posted June 28, 2018 Author Report Share Posted June 28, 2018 When I kick it, it don't even try to start not even with starting fluid I can't find a spark plug around here no where so I guess ill have to order on internet. How do u know if timing ain't right Quote Link to comment Share on other sites More sharing options...
Art Posted June 28, 2018 Author Report Share Posted June 28, 2018 When I put the number off motor which starts with M and number off bar right under handle bars which is the same on motor it just starts with B it comes up with nothing?? Why Quote Link to comment Share on other sites More sharing options...
Art Posted June 28, 2018 Author Report Share Posted June 28, 2018 Do yaw think the motor might be bad cause I can't get it to even try to crank up? Quote Link to comment Share on other sites More sharing options...
Art Posted June 28, 2018 Author Report Share Posted June 28, 2018 I'll post a couple pics i painted it Quote Link to comment Share on other sites More sharing options...
Art Posted June 29, 2018 Author Report Share Posted June 29, 2018 Spark plug was wet what do u mean cough? Quote Link to comment Share on other sites More sharing options...
stevem75 Posted June 29, 2018 Report Share Posted June 29, 2018 Bultacos were given model numbers instead of years. You look to have an M99 I’m guessing. The 99 is the model. Using the link to the reference list in another post you’ll note that a M99 is an alpina. These were produced over several years which is why bultacos cant accurately be referred to by year. That model was made for several years and it would be impossible to know exactly when it was made Now to the running issue. It takes three things to make and engine run. Spark, fuel , and compression. Start simple and remove the spark plug. Connect it to the coil wire and lay it against the cylinder head. Crank over the engine with the kickstart and watch to see the plug spark. If it doesn’t then get a new spark plug. Bultacos use the most common spark plugs in existence. Any Napa or auto parts store will have them. NGK is the most common brand and B8ES is the type of plug you need. They’re cheap. Buy a few to have around. With new plug in hand check for spark again. If still no spark then there is likely a wiring issue somewhere in the system. Or the points need cleaning because of sitting Fuel is next..... if the bike has been sitting you need to make sure the carb is clean. It may need to be disassembled and thoroughly cleaned to get old residual funky fuel out of. Same goes for the fuel tank. Make sure you’re using fresh fuel and mix it properly with a good quality 2 cycle oil. We could argue about who uses what oil at what ratio but just buy a name brand two cycle oil and mix at anywhere from 30-50:1 and you’re good. Compression is next. Any two cycle engine requires primary and secondary compression. Primary compression means that the crank cases are sealed properly. This is done on the bultaco (or any other 2 cycle engine for that matter) with crank seals and a Center case gasket. These seals help to hold the atomized fuel inside the crankcase and not allow it to leak out. As the piston travels down the bore it pressurizes this mixture and forces it through the cylinder transfer ports and up above the piston where it will then be compressed in the combustion chamber. Combustion chamber compression can be considered “secondary compression “. So basically you need to have no ability for the fuel to leak out or around the crank seals, Center gasket , base gasket and piston rings. And not to mention no way for air to leak in through gaskets and seals. Using starting fluid you should at least be able to get the bike to fire. If only for a moment. You may have leaky seals or gaskets Not surprising on a bike that’s 40+ years old They’re easy to replace and readily available Spark fuel compression. Yor bike is not running because of one of those three things. Or a combination of those things. Steve PS : in North America there are two very good bultaco dealers. Hughs bultaco in upstate New York and Mobley’s in minden Nevada. The UK also has an array of dealers. In motion trials, Sammy miller. All the above noted dealers have anything you’d ever need for that bike Quote Link to comment Share on other sites More sharing options...
feetupfun Posted June 29, 2018 Report Share Posted June 29, 2018 (edited) Bike in photo looks like M85 Alpina (round barrel) 250cc. This model was introduced in 1972. M99 is (square barrel) 325cc Edited June 29, 2018 by feetupfun 1 Quote Link to comment Share on other sites More sharing options...
stevem75 Posted June 29, 2018 Report Share Posted June 29, 2018 Ah yes right you are. M85 would be correct Quote Link to comment Share on other sites More sharing options...
lorenzo Posted June 29, 2018 Report Share Posted June 29, 2018 Art - May I suggest you don't try to start it without the mag. cover in place.........repeated kicking will probably bend the unsupported shaft. Quote Link to comment Share on other sites More sharing options...
Art Posted June 29, 2018 Author Report Share Posted June 29, 2018 Oh thank you for that I didn't no that Quote Link to comment Share on other sites More sharing options...
Art Posted June 29, 2018 Author Report Share Posted June 29, 2018 Is the m99 is that a 250?? Quote Link to comment Share on other sites More sharing options...
Art Posted June 29, 2018 Author Report Share Posted June 29, 2018 Oh so ur saying my bike is probly a m85 250cc? 1972 1 Quote Link to comment Share on other sites More sharing options...
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