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400ex jet


TR33_FRoG738

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i put a higher compression piston in my 400ex and now when i drive it roughly every 30 seconds or so it dies down like it is out of gas then it picks back up again after about 5 seconds of that, i was wondering if the piston would require a bigger jet or could it be because i dident get it back in time just right?

ps. it has a pipe on it but im not sure if its full or slip on

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