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Carb synchronization question

7415 Views 7 Replies 6 Participants Last post by  ashdale
Hey all, I just got a 2003 LTD 660 and am currently doing all the maintenance the previous owner neglected to do. I have a v-star 1100 that I maintain and I sync the carbs as regular maintenance. I made my own manometer for vaccuum and it is really easy to do and makes the bike run great. Do I need to do it on my Raptor? It has 2 carbs, the shop manual shows a sync screw and says to sync the carbs but here is my problem...
I cannot find the vaccuum tube for the right side carb. There is a capped one on the left but nothing on the right. Did I miss something? Any help would be appreciated.
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Unless you seperate the two carbs, you shouldn't have to synch them.

Welcome to the site :thumbsup:
I would also think that since both carbs are feeding a single cylinder, synching them would be somewhat unnecessary.
russ said:
I would also think that since both carbs are feeding a single cylinder, synching them would be somewhat unnecessary.
Good point. Its just so easy to do I thought I would add it to my regular maintenance as I know the difference it makes on my V-Star but again that is 2 cylinders. There is the sync screw in between the carbs though. How would the shop do it or would it be a scam you pay for thinking they tuned your bike?
nuckledragger said:
russ said:
I would also think that since both carbs are feeding a single cylinder, synching them would be somewhat unnecessary.
Good point. Its just so easy to do I thought I would add it to my regular maintenance as I know the difference it makes on my V-Star but again that is 2 cylinders. There is the sync screw in between the carbs though. How would the shop do it or would it be a scam you pay for thinking they tuned your bike?
I think there's something in the manual about syncing them, it was bench work tho, a matter of checking that the butterfly's opened at the same time. I think it said to use the shank of a small drill bit and slide it past the butterfly.
Thanks..
just did it myself and the only thing the manual refers to is using a small drill bit or feeler guages to acknoledge the butterflys are opening at the same time
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