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| what series carb https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=4491 |
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| Author: | hx35w [ Fri Jun 12, 2015 9:31 pm ] |
| Post subject: | what series carb |
What series Keihin carb was factory installed on the early CR250M? Was it a PE or VM? I need to find someone that carries a replacement needle jet |
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| Author: | evelmike [ Sat Jun 20, 2015 6:17 pm ] |
| Post subject: | Re: what series carb |
Is it the needle that you need? Keyster part# kh-0138 will have what you need. I got mine from Rusty Riders. 740 522 8875 |
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| Author: | hx35w [ Sat Jun 20, 2015 11:39 pm ] |
| Post subject: | Re: what series carb |
I have a NOS jet needle. What I am looking for is the needle jet. I have a bad problem with the engine loading up a lot just off idle To the point I'm blowing out raw fuel from the pipe. I went from a 148 main down to a 140 jet. It reduced the amount of raw fuel but still un-useable. I had no idle adjustment at all. I have replaced about everything except the needle jet. I have a n.o.s. 679B carb I installed and it ran grate. There not much left to replace. I suppose the choke may not be sealing and letting excess fuel by. I didn't mention, I'm referring to a 76 cr250m |
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| Author: | evelmike [ Sun Jun 21, 2015 5:38 am ] |
| Post subject: | Re: what series carb |
I have not seen any kits yet that come with needle jets. I do alot of carbs and have never had to replace one. Pull out the choke plunger and look at the end. If the rubber end is torn or deteriorated that needs to be replace. I have never seen one go bad on a Keihin; Bing carbs are notorious for this. I had exactly the same problem last week on my 75 Cr 250. This is my third resto on 1975s and two out of the three ended up with new mikunis. Did u ck float for leaks. What about height? Factory book says 19mm. I'm betting you carb body is cracked or just plain worn out. I never did find the problem and I spent days checking and adjusting. Put the original carb in a box and get a Mikuni vm. You will be happy you did. Good luck |
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| Author: | evelmike [ Sun Jun 21, 2015 5:42 am ] |
| Post subject: | Re: what series carb |
Nice pics by the way. Ck out the bike galley on the home page.Mine is the only 75 Cr 250 |
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| Author: | hx35w [ Sun Jun 21, 2015 8:35 am ] |
| Post subject: | Re: what series carb |
Thanks, thanks for all the input. I will check the choke plunger and see if I can get air/fuel to bleed by. |
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