Classic 2Stroke Yorks
Would you like to react to this message? Create an account in a few clicks or log in to continue.


Based in Yorkshire, the centre of the known Universe.. But open to all. Everyone is welcome.
 
HomeHome  Latest imagesLatest images  RegisterRegister  Log in  

 

 Jetting for DG pipes

Go down 
3 posters
AuthorMessage
JosephRomano




Posts : 7
Join date : 2019-01-24

Jetting for DG pipes Empty
PostSubject: Jetting for DG pipes   Jetting for DG pipes EmptySun Feb 17 2019, 20:40

Hey guys I'm wondering if anyone here has DG pipes on their rd 250 and what jet they used make it run right? I found a diagram saying to test 140- 155 main jets with this pipe setup, but was wondering if someone has an exact jet size that works.
Back to top Go down
Rob62
Admin
Rob62


Posts : 390
Join date : 2017-10-17
Age : 61

Jetting for DG pipes Empty
PostSubject: Re: Jetting for DG pipes   Jetting for DG pipes EmptySun Feb 17 2019, 21:21

My experience of jetting my own bikes, and reading others experiences too, is that there is no “exact” setting. All bikes are different, there ar lots of other variables not just the pipes; fuel! Weather conditions, engine porting, air filters..... my advice would be to get the bike running and carefully test the mixture at the various throttle openings i.e. idle, quarter throttle, half throttle and finally full throttle....the main jet only affects half throttle to full throttle so just messing with that is unlikely to give a good result. If you are experienced you can hear and feel how the engine responds to throttle. You can also try plug chopping, its takes time and knowledge to get it right. If you dont have the experience you could always take the bike to a 2 stroke specialist tuner with a dyno and get him to set it up for you. If you decide to do it yourself Its safer to start with rich settings and go from there, it only takes a few seconds of full throttle to wreck your motor if you get it wrong. Start with a big main jet, lift the needles, set up the idle first and progress from there. Good luck.
Back to top Go down
yam3anarthur

yam3anarthur


Posts : 69
Join date : 2018-06-16

Jetting for DG pipes Empty
PostSubject: Re: Jetting for DG pipes   Jetting for DG pipes EmptyMon Feb 18 2019, 17:10

what rob said
Back to top Go down
Sponsored content





Jetting for DG pipes Empty
PostSubject: Re: Jetting for DG pipes   Jetting for DG pipes Empty

Back to top Go down
 
Jetting for DG pipes
Back to top 
Page 1 of 1
 Similar topics
-
» About Carb Jetting

Permissions in this forum:You cannot reply to topics in this forum
Classic 2Stroke Yorks :: In the Garage / Workshop :: Technical Questions-
Jump to: