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Buell Forum » THUMPer Forum » Buell Blast Thumper Knowledge Vault » Diagnosing problems: » Power Loss and ONLY 30MPG 0-0 « Previous Next »

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Nkjn3979
Posted on Friday, November 15, 2013 - 01:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hello guys, I am back on the forum, finally. I was moving and experience a close call bike theft twice now at my new apartment. Anyhow, I made some good appearance mods. I got new handlebar mirrors! (the original mirrors were destroyed during the theft attempt)







So, the issue here is that ever since I bought the bike used 5 months ago, it had 30miles per gallon. I thought it was supposed to be like that since it was a single cylinder, but now I know its not!!! Also, when I pull on the throttle all the way, it loses power. If I pull on the throttle half way, it revs normally. Just when I pull it all the way, the rev sound jumps to a high note and loses power. I already changed the BOOT. I am guessing it is the jetting of the carbs since the bike has vines&hines exhaust and K&N air filter inside the airbox. PLEASE HELP T-T
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Gearheaderiko
Posted on Friday, November 15, 2013 - 08:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

No time for a full answer but. DO NOT PULL THE CARB APART TO GIVE IT A GOOD CLEANING.
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Gearheaderiko
Posted on Saturday, November 16, 2013 - 06:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You'll have to check the jetting. It can be checked with the carb on the bike, if you're familiar with it. Drop the bowl and use a mirror to see what numbers are on the keys. You'll also have to see if it has a stock or matching needle if they used a so called "jet kit". My guess, as is yours, they fouled up the jetting, which could include mixing stock parts with a jet kit.

But first see what numbers are on the slow jet and main jet. With a little luck we can decifer what they have done.
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Nkjn3979
Posted on Sunday, November 17, 2013 - 01:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Got it, thanks alot! I will go ahead to check the jetting on the bike.
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Vicenzajay
Posted on Sunday, November 17, 2013 - 03:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

In before the rest of the gang says it:

"Lose the Dunlops...that front tire will dump the bike"

Seriously, suggest moving to Pirelli MT-75 or the Diablo Scooter tires...

Obviously your carb jetting/mpg/power loss issue is the most important, but there are lots of folks here who have had the Dunlop front tire dump them.
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Gearheaderiko
Posted on Sunday, November 17, 2013 - 10:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Concur!

"What numbers are on the keys" keys should read "jets" but my guess is you figured that out! (Dam auto -correct!)
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