Noel09 Posted yesterday at 12:47 AM Report Share Posted yesterday at 12:47 AM (edited) Hi everyone. I'm totally new to trials and just bought an old 2007 rev 4T 250 4-stroke. I'm fixing a few things and have a carb question. What carb is in my bike? I want to order a kit as the bowl gasket it weeping. The carb is a mikuni. There is some writing on one side. Looks like 33 79 L691? I did ask chatgp and it reckons it's a mikuni BSR33? But just want to make sure. Thanks Noel Edited yesterday at 12:49 AM by Noel09 Quote Link to comment Share on other sites More sharing options...
Tr1AL Posted yesterday at 02:10 AM Report Share Posted yesterday at 02:10 AM @Noel09 www.betausa.com -support - trials - owners manuals = MIKUNI SE BSR 33-79 The information is all there. Regards Alan 1 Quote Link to comment Share on other sites More sharing options...
lemur Posted yesterday at 01:37 PM Report Share Posted yesterday at 01:37 PM Yep, you have the most complicated and problematic carburetor design that was ever installed on a motorcycle so that they did not have to buy a fuel injection system from Honda. Most of the problems will be in the bottom half of the carburetor where the ethanol fuel evaporates out of the float bowl and leaves solids and corrodes parts, the top half won't be a problem until the rubber bits start to degrade and lose critical engine vacuum pressure. Avoid ethanol fuels if at all possible. 2 Quote Link to comment Share on other sites More sharing options...
Noel09 Posted yesterday at 02:40 PM Author Report Share Posted yesterday at 02:40 PM 12 hours ago, Tr1AL said: @Noel09 www.betausa.com -support - trials - owners manuals = MIKUNI SE BSR 33-79 The information is all there. Regards Alan Thanks Alan. Really appreciate it 1 Quote Link to comment Share on other sites More sharing options...
Noel09 Posted yesterday at 02:41 PM Author Report Share Posted yesterday at 02:41 PM Cheers, typical of me to buy problems! 🙄 Quote Link to comment Share on other sites More sharing options...
Tr1AL Posted 22 hours ago Report Share Posted 22 hours ago (edited) 5 hours ago, Noel09 said: Cheers, typical of me to buy problems! 🙄 Even new bikes have problems sometimes , its all good because as you work through it you learn a load of things that will help you in many future problems. Have a good evening . Best wishes Alan. Edited 22 hours ago by Tr1AL 1 Quote Link to comment Share on other sites More sharing options...
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