Main Jet Numbers

2muchhp

2muchhp

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Jan 18, 2007
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202
Location
Traverse city, MI
Does anyone have a chart or info. that tells what the yamaha part number is for the corresponding main jet sizes?
I need to mail order jets (I cant find any in town)and I cant seem to find the information I need,what size is next
size up or down and what the part number is etc. Is there a better place to order these jets besides the dealer?
I have parts for the Mikuni round slides, nothing for these flats.
 

what size jets do you want?, I can provide the part numbers,as should any yamaha dealer but we know how they can be lazy....lol
 
Well right now my Viper has the original 156.3 I would like to get the next two increments larger and one increment smaller. I dont have and cant find anything to info to tell me what hte increments are so I dont even know the size. I have converted to the SRX heads so I may have one cylinder a bit richer to early to tell I have also done a little porting(Sport Port) I am not sure how much differance it will make I just want to have jets if needed. And right the Yamaha dealer I called was not interested in helping at all. My closest dealer is about 45min away...sucks.
 
Cant speculate on what size you should try or run BUT Bender racing has a page that lists all the OEM Yamaha sizes and aftermarket in betweens.
 
I just ordered a couple of jets for my Viper yesterday. Yamaha dealers seem to charge more for small items in my opinion. Mail order is very simple. Pioneer Performance sells jets at $3 each. 716-496-8800
No worries about part numbers either just tell them what sled model.
 
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Yes what size I actually need is tbd.I was hoping there was something out there that stated part numbers and sizes.I checked out and found what you meant on the Bender site I may go that direction or pioneer
they are a bit cheaper.Yamaha part numbers would be nice incase of emergency, I could make the trip if they had them.
 
here you go:

156.3=3G2-1423E-62-00
157.5=3G2-1423A-82-00
158.8=3G2-1423E-63-00
160=3G2-14321-32-00

155=3G2-14231-31-00
153.8=3G2-1423E-61-00
152.5=3G2-1423A-81-00
151.3=3G2-1423E-60-00
150=3G2-14231--30-A0

shouldnt have to deviate from here, but there is alot more on the list going smaller.
 
2muchhp said:
Yes what size I actually need is tbd.I was hoping there was something out there that stated part numbers and sizes.I checked out and found what you meant on the Bender site I may go that direction or pioneer
they are a bit cheaper.Yamaha part numbers would be nice incase of emergency, I could make the trip if they had them.
Click to expand...

Are you running the SRX carbs or the Viper carbs. I have heard of a few guys running the SRX carbs in a Viper. Something about the needles being richer?
 
I was advised to run the SRX nozzles and needles in my Viper carbs from J Simons at CPR. We were trying to flow more fuel for a BB. There is a large selection of needles, nozzles, air jets, slides, main jets and pilots for the Mikuni 33mm carb.
 
Devilin AblueDress! said:
Are you running the SRX carbs or the Viper carbs. I have heard of a few guys running the SRX carbs in a Viper. Something about the needles being richer?
Click to expand...

Right now the Viper carbs, jet the mains correct ,raise the needle,should be ok. I dont want to change to much right now incase something isnt quite right it will be a pia to figure out with a bunch of changes all at once.Somthing to think about tho.

Thanks for the info snowdad, thats what I needed.
 
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