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I added the 132.5 because the bike was super lean after I did a mod to the stock exhaust and air box.

Thanks for the link to the UK site. SSR has been really slow getting back to me about parts and they are pricey.

I tried that UK parts website and I'm waiting on some parts in the mail now. I got some jets from Rockymountainatv.com and they were cheap. I have the jet #'s below. They were super cheap. If you need carb parts tell them you have a 2012 Yamaha tw200 and they should be able to look up most parts.

I have a 132.5 main jet in mine now and it runs well, my gas mileage has gone way up from 65 to 80mpg. I tried to raise the needle using a shim but it causes problems with deceleration. I think its still a bit lean though.
Mikuni N102/221 Series Main Jet

Have you ever found any jets for the Carb on these bikes? I have been ordering parts from the UK for the pulse adrenaline bike they have over there is the same bike but still dont know what kind of jets or where to get them for this carb my bike runs lean and would like to richen it up some w different jet. if you need parts http://www.chinesemotorcyclepartsonline.co.uk is a good place for most parts but some the shipping is to high but most parts shipping is good.

Hello, I have the same bike as you SSR XF250GY and was wondering what you have found about it such as where you get parts? I just ordered a kn136 oil filter hoping it is the right one due to the amount ssr charges for a filter lol. I noticed today when i was checking my valve clearances there is much carbon on my piston and the bike is still new barely even 600 miles on it. I took petcock off cleaned screen it had many pieces of rust on it and the rust specs got in my carb vent lines and gas line took me two days to fix that problem. Just figured I would message you since I dont see many people with this same bike would be nice to exchange info.