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Buell Forum » THUMPer Forum » Blasting Away - The Thumper Quick board » Archive through June 15, 2010 » Might be adding some more HP after all! « Previous Next »

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The4ork
Posted on Tuesday, June 08, 2010 - 04:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

is there any way to raise the redline from 6500 to 7500?

i have to pull my head off to get a exhaust stud fixed, im thinking about taking it apart, polishing it up, matching the intake, and while im in there im realllly contemplating getting the drop in high comp piston. but at the very least i will get the high comp headgasket, as im def. gonna need a new one anyways. and while im at it, i may either take the base gasket out, or shave the jug a tad.

if i go with the high comp piston will i need to retard the timing at all? it never pings as it is right now and i run 91 in it almost all the time
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Ezblast
Posted on Tuesday, June 08, 2010 - 03:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

A different ignition, and head springs, valve guides and seals. The hi- comp would add a few ponies all to itself. No timing changes needed.
EZ
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Gearheaderiko
Posted on Thursday, June 10, 2010 - 12:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Concur....mostly! Ignition and different springs are all you need. The beehive springs are now lower priced from Revolution Performance and should fit without grinding the rocker covers.
However, going that far and not doing at least the high comp piston and shorter valve guides would be a shame. IMHO, I wouldnt bother shaving anything. If those parts fail, then you need to shave any new parts and it just adds 1 more inconsistent change to everything. That means after you tune everything to that set up you will have to duplicate those shaved parts if they need replacement. It also wont be the magical change to as yet unseen unknown horsepower. There are better places to spend your money (Unless its free. Used cylinders are cheap to find).
You'll probably need a new base gasket as you'll probably disturb the old one when you remove the head (though it is possible to reuse the gasket- but thats a lot of work if it leaks).
Make a plan and look to the future for other possible mods. You can spend $1000 and get the same results two different ways. One way is a dead end, the other way leaves the door open for more improvements.

*There are reasons to shave, but if you're just looking for run of the mill extra reliable power, then "off the shelf" is the better way to go. Again, my opinion.
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The4ork
Posted on Friday, June 11, 2010 - 07:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

what should i do for ignition?
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Gearheaderiko
Posted on Friday, June 11, 2010 - 09:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The Twin Tec is a good choice (contact them first to see if the 'choke' and TPS will still work).

You can also hook up many (adjustable or 7500 rpm limit) HD/Buell 'nose cone' v-twin electronic ignitions, but you'll need to wire up the enrichener (choke) to a separate switch or convert to a manual choke carb. It can be a lot less money. You may also need a different coil depending on the ignition.

A little more work than that is using the external module ignition found on the rest of the HD/Buell models. It takes a bit more wiring and research, but more SE ignitions seem to be available for it.

Unfortunately they no longer make the SE module that was a direct easy bolt in for the Blast: (

For more info search here:
http://www.badweatherbikers.com/buell/messages/201 64/59815.html?1274563024
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Ezblast
Posted on Saturday, June 12, 2010 - 12:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Concur! - Erik really been researching this and another gent here built his own ignition. A real sharp cookie - lol -

- with the twintech you have to have their coil as well - different resistance values than stock - no biggie - its not real pricey - 39.99 for the one - miniature and easy to mount.
EZ
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