John Cingel
Member
Decided to replace my carb. Question is I have a 2008 mastiff wit big radius 2 into 2 with stock vance & hines baffles. Where should I start with jet sizes?
Jet sizes?
- Thread starter John Cingel
- Start date
pauldeepsea
Guru
What do you have in there now? And what carb did you go with?
I would see how it's running and look at the plugs to see if it's lean/rich
BWG56
Guru
31 inter and 76 main, you could always pull the bowl off the old one and see what was in there
John Cingel
Member
Not sure what is in it now. I haven't taken it apart yet. Just recently got the bike. It had no baffles when I got it and it was a bit louder than I like. I put a set of baffles in an now can't get it to run rite. Tried to adjust carb according to s&s instructions but when I tried to lean it out it never wanted to stall with the idle mixture screw all the way in. I don't know if someone damaged the carb or its messed up from sitting a long time. I figured I would replace the carb with a new super g and at least I know I'll be starting from square one with the carb. That's why I was asking about the jets. The ones that are in there may not even be the rite ones
pauldeepsea
Guru
When you say not run right, what exactly are the symptoms?
John Cingel
Member
Seems to flood out on cold start. If I change the plugs it starts up but idles rough until it warms up.
John Cingel
Member
No enricher Just a couple twists.
Try it with the enricher, see what effect that has..
BWG56
Guru
And no twist's, but as soon as it starts, turn the enrichner off and use the throttle.
pauldeepsea
Guru
I would check your carb settings first, may not be getting enough fuel at first. How does it idle? Any changes in idle rpms? What rpm range is it running in when idling?
Sorry for all the questions just trying to get an understanding of what your bike is doing.
Butch Cassidy
Active Member
I have a 107 and also run 31/76 ... but that is what xXx carb put in when he updated my Super G carb. You might want to talk to him before you do anything.... he is a wealth of knowledge.
John Cingel
Member
Update on jet situation. Haven't replaced carb wanted to try switching the jets first. Pulled carb apart it had a 32 & 84 . I switched it out for a 31 & 76 . Took bike for a ride and once it warmed up it seemed to almost want to stall when I gave it gas. When I tried to adjust the idle mixture screw according to instructions turned all the way in had really no affect on the idle. I'm pretty new to this so any recomendations
would be appreciated .
would be appreciated .
Butch Cassidy
Active Member
.. have you adjusted the accelerator pump..? If that is too lean it will cause a stall ... but first, go back to the standard settings for idle speed and mixture and pump. The best place to start is the beginning. You can set these three things with the motor off; and it should start... and take it from there....https://www.sscycle.com/docs/default-source/default-document-library/carbtuningguide.pdf?sfvrsn=2
BWG56
Guru
See if this will help you
I would first check the float/fuel level and replace the fuel mixture screw as they wear out.
Also make sure the little blue O ring is where it is supposed to be and then do your carb adjustment.
By the way have you checked the rubber cap on your intake manifold? It might be perished.
This article is very good to read too.
http://www.bikernet.com/pages/story_detail.aspx?id=7153
Paul.
Also make sure the little blue O ring is where it is supposed to be and then do your carb adjustment.
By the way have you checked the rubber cap on your intake manifold? It might be perished.
This article is very good to read too.
http://www.bikernet.com/pages/story_detail.aspx?id=7153
Paul.
