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rd 400 main jet help
http://kawi2strokes.com/forum/viewtopic.php?f=11&t=3016		 Page 1 of 1
Author:  LIRUSS [ Thu Apr 12, 2012 9:11 am ]
Post subject:  rd 400 main jet help
what main jet is recommended for a 76 rd400 with dg pipes ? is the stock size 140 ?
Author:  evansje1 [ Thu Apr 12, 2012 9:09 pm ]
Post subject:  Re: rd 400 main jet help
I can't tell you what size but I can tell you it will not be the stock main jet size. It also depends on if you are running stock air box or a Y boot, stock carbs or larger carbs, and stock or modified porting. Jump on this forum http://www.2strokeworld.com/forum/index.php and give the complete set up and I bet you will get some pointers. My Daytona is running chambers, Yboot, VM30's and I am running 230's on the mains.
Author:  LIRUSS [ Thu Apr 12, 2012 11:46 pm ]
Post subject:  Re: rd 400 main jet help
im running stock carbs, stock air box & boots with a uni foam filter & dg pipes, currently running 150 mains but it runs like crap ! thanks for the link
Author:  evansje1 [ Fri Apr 13, 2012 5:46 am ]
Post subject:  Re: rd 400 main jet help
Russ, The main jet is only going to make it run like crap at the wider throttle openings 3/4 to full. You sure it is not the needle height or something else?
Author:  LIRUSS [ Fri Apr 13, 2012 8:49 am ]
Post subject:  Re: rd 400 main jet help
you might be on to something ! dam , i wish i had more time for tinkering & road testing
Author:  Ja-Moo [ Fri Apr 13, 2012 2:30 pm ]
Post subject:  Re: rd 400 main jet help
Mark and Dave will fix you up at the Gap......
Author:  evansje1 [ Fri Apr 13, 2012 5:03 pm ]
Post subject:  Re: rd 400 main jet help
Ja-Moo wrote:
Mark and Dave will fix you up at the Gap......


Dats what you need to do and I'll supervise! :D
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