| Vintage Dirt Bike Q & A https://vintagedirtbikeforums.alp-sys.com/ |
|
| 1979 CR250 problem https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=1040 |
Page 1 of 1 |
| Author: | Stinkerbelle [ Thu May 11, 2006 10:01 am ] |
| Post subject: | 1979 CR250 problem |
I just finished my project 1979 CR250 and started it up last for the first time last night. When it fired up, it totally revved out like the throttle was stuck. I shut it down and tried it a couple more times, with the same result. I’m sure I must have screwed something up, I just don’t know what. The throttle seems to be working okay, at least I can hear the carb slide moving when I work it. It has a new flat slide Mikuni on it from Vintage Iron. Any suggestions on what to check would be appreciated. |
|
| Author: | redrocket190 [ Thu May 11, 2006 12:47 pm ] |
| Post subject: | |
If the throttle slide is not stuck I would suggest you have an air leak - carb boot, base gasket, ignition-side crank seal etc. What did you touch? |
|
| Author: | Stinkerbelle [ Thu May 11, 2006 4:52 pm ] |
| Post subject: | |
Basically, I have touched everything. I had a shop tear down the engine so I could have the cases, head and cylinder powder coated. They put it back together with a new gasket and seal set. Boy, I hope it's not something there. That was a lotta work ago.... The carb to reed valve boot is new, so I should be okay there, unless it's not sealing right at the carb. Would an air leak make it run that fast? The thing is screaming and I have to just shut it down so it doesn't hurt itself. I thought of an air leak somewhere, but I thought (hoped?) it wouldn't make it rev that high. I think I'll do a little more investigation on the carb. So how do I check to determine if it is an air leak? Thanks for your help... Stink |
|
| Author: | ktm450exc [ Thu May 11, 2006 5:50 pm ] |
| Post subject: | |
Take it to a shop and have them perform a leakdown test on the motor |
|
| Page 1 of 1 | All times are UTC - 7 hours [ DST ] |
| Powered by phpBB® Forum Software © phpBB Group https://www.phpbb.com/ |
|