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Buell Forum » THUMPer Forum » Buell Blast Thumper Knowledge Vault » Engine - all topics related to the Motor » Engine - Carburetion & Intake » Rejetting question... « Previous Next »

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Archive through March 26, 2008Ezblast30 03-26-08  12:54 am
Archive through March 23, 2008Buellistic30 03-23-08  02:50 pm
Archive through July 30, 2007Swampy30 07-30-07  07:25 pm
Archive through March 04, 2006Manomako30 03-04-06  08:50 pm
         

For More carb breakdown pics:
http://www.badweatherbikers.com/buell/messages/20164/179061.html?1206245377

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Gearheaderiko
Posted on Wednesday, March 26, 2008 - 01:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Well, actually the carb would fit, its just not an exact replacement and some mods would need to be done. Keep what ya got!
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Myrtleblast
Posted on Thursday, March 27, 2008 - 08:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

well, no luck. i bought a new vacuum piston, the piece with the diaphragm, and the problem still persists. I'm confident now that the problem is the float.

What are the symptoms of a damaged or out of adjustment float???????
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Ezblast
Posted on Thursday, March 27, 2008 - 04:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

A float would either allow too much gas or not enough - it is das boot - I said if it wasn't one then it had to be the other.
EZ
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Myrtleblast
Posted on Thursday, March 27, 2008 - 05:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Eureka!!!!!!! Hallelujah!!!!!!! Holy freakin' ****!!!! WOOOOOO HOOOOOOOOOOO!!!!!!!!!!


It was......

The SPARK PLUG!!!!

I talked to a guy who said it is common after a re-jet that the engine runs richer and the plug can get carbon build up. I put in a NGK plug and my BLAST is a BEAST!!! i can definately tell the upgrades helped. velocity stack, rejet, shim and relocating the breather tube have made my blast quite a fast little scooter!!!! thank you to everyone who has given me input, and remember this in the future if you come across someone with the same symptoms.

case closed...
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Ezblast
Posted on Thursday, March 27, 2008 - 06:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Woo hoo - lol the trick is - we are not there to check such stuff - and if you where using the Iridium racing plug - the question would never have occurred - each situation is different and you can only offer most likely scenarios - the plug does produce those symptoms if the wire is loose or the plug partially fouled, however, since your plug was fine before, it is a common given that it would be fine afterwards - in this case we of course would be wrong. It is always a good idea - in my book - to check your plug every 3000 miles or so just to make sure everything is fine.

Yes those mods really waken the bike up and make it a hoot to ride - stock is nice, but the dark side brings new joy to an already great little bike!
Welcome to the Dark side!

EZ
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Muckerpuck
Posted on Thursday, March 27, 2008 - 06:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

thank god ,, i think everyone was runnin out of ideas for ya... blast it up..
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Myrtleblast
Posted on Thursday, March 27, 2008 - 07:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

AAAAARRRRRRRRGGGGHHHHHHHH!!!!!!!!!

well, it's at it again. ran like crap on the way home. let it cool down, took out my new plug, and it looks worse than the stock one I took out. at least now I know what's causing my bike to run like crap; fouled plug. now I just need to find out why my bike is running so rich. this is killen' me...
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Imadreadhead
Posted on Thursday, March 27, 2008 - 07:10 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

"Quote from Ez"A float would either allow too much gas or not enough"Quote"

To much gas!!!
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Ezblast
Posted on Thursday, March 27, 2008 - 08:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

A 170 should be lean - this is strange - ahh - I know - are you running my old style filter or the one I recommend now - also from Outerwears - its custom and costs a bit more, however, it flows twice as much air - and works very well -
that is a good question. Issues did appear on the old style standard style - if its white its right - for the color of the filter - they have only ever made it in white - being a custom material - it has only come in white so far - if enough folks order it, then perhaps it could get regulated to regular and then colors - at least I know when its dirty and needs washing;0) -
EZ
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Imadreadhead
Posted on Thursday, March 27, 2008 - 11:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

hes running a regular pre filter made by outerwears...just any old one made for a K&N style filter cut to fit!!!
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Ezblast
Posted on Thursday, March 27, 2008 - 11:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The regular is restrictive and will starve you between 3500 rpm and 5000 rpm causing all kinds of weird stuff to happen and usually happens in WOT conditions - not really as noticeable in partial conditions.
EZ
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Imadreadhead
Posted on Friday, March 28, 2008 - 12:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

what i dont understand is that all of you say dont touch the float...and be VERY careful not to bother the float and then he said he most def, touched it, bumped it...abused it...atleast a few times..and no one has said what to do in this situation

you said yourself that the float could cause it to have too much fuel or too little fuel and obviously he gettin wayyyyyyy to much fuel if he fouling the plug that easy...

So...how does he fix the float problem
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Muckerpuck
Posted on Friday, March 28, 2008 - 01:07 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

there i did the legwork on this one....

8. Perform float level check as follows:
a. Place carburetor on a clean flat surface with the
intake manifold side down. See A of Figure 4-20.
b. Tilt the carburetor 15° to 20° in a counter-clockwise
direction until float comes to rest. See B of Figure 4-
20.
NOTE
The measurements will be incorrect if the carburetor is tilted
less than 15 ° or more than 20 °.
c. Using a dial vernier caliper or dial caliper depth
gauge, measure the distance from the face of the
carburetor flange to the outboard edge of the float.
Be careful not to push on float while measuring.
d. If the measurement is between 0.413 inch and
0.453 inch (10.49 -11.51 mm), then the float level is
within specification. Proceed to step 9.
e. If the float level is not within specification, remove
the float, and referencing the table below, carefully
bend the tab slightly to adjust the float level. For
example, to increase the float measurement, bend
the tab toward the carburetor body. This will have
the affect of decreasing the amount of gas in the
float bowl after assembly.
f. Install float and check float level again. Repeat procedure
as necessary until float level is within specification.
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Ezblast
Posted on Friday, March 28, 2008 - 01:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

You do the float according to the manual - carb comes off bike - new floats are solid so usually it is only mis adjusted - usually the float tweeks too much gas - as gas pouring out the carb - since that didn't happen - I suspect the other.
EZ
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Gearheaderiko
Posted on Friday, March 28, 2008 - 01:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Right on Mp!
But if he's using the wrong Outerwear filter it will cause problems. Running without a filter would generally make those problems go away.
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Imadreadhead
Posted on Friday, March 28, 2008 - 01:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Thank you guys...im sure he will really appreciate this...if its not the filter then it has to be the float..

I dont see how a thin material like the pre filter can stop so much air from going into the carb as to make it not run right

and thank you muckerpuck!!!!!
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Styxnpicks
Posted on Friday, March 28, 2008 - 09:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I had SOOOOOO many problems with the outerwears filter choking the intake
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Ezblast
Posted on Friday, March 28, 2008 - 10:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Yeah, but I fixed that;0)
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Myrtleblast
Posted on Friday, March 28, 2008 - 12:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

YEEEEEEEE HAAAAWWWWW!!!!!!! i figured since it was running so rich i would remove the shims. guess what? after an hour long ride last night it runs perfect. not as crisp as it was before, but no more carbon sputtering: the top end is definitely lacking something...

i think since i didn't install the 175 jet, plus the more restrictive intake filter, it was running waaay rich.

EZ, can you provide me with a link to order the custom cover you are talking of? thanks!!!

Gearheaderiko, if i run without a filter, wouldn't that allow debris to be sucked into the carb!!???

(Message edited by myrtleblast on March 28, 2008)

(Message edited by myrtleblast on March 28, 2008)
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Ezblast
Posted on Friday, March 28, 2008 - 03:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Outer Wears Stack filter outerwears.com - the new part number is - "100 - 2651" - you'll have to call them. Try shimming it after the new filter is applied - the result will be better.
EZ

(Message edited by ezblast on March 28, 2008)
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Reuel
Posted on Saturday, March 29, 2008 - 01:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I accidentally put in the B50s yesterday. Now, I go from full throttle to as slight drop in throttle and get more power. That's with a 175. Do I go 180, or add shims, or what? Spark plug was still very white before I did it.
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Ezblast
Posted on Saturday, March 29, 2008 - 03:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

48/180 should do it - its working well for my city bike, even on backroads, yes I'd shim - 1 to 2 - I do 2 #6 machined brass washers in both - its still not super rich - just a slight smell with the huff at shut off. Take off on the force is as good as its going to get - will probably cut the can off and add another Suppertrap 4" Disc with 2" inlet - the sound is cool, mucho quieter, and the bottom end will be much better - I'll loose a hp at the top, but it would be worth it for the return of a bottom end - though from 3000 rpm up the acceleration is almost as crisp as my weekend bike - a real testament to the ability and tuning of the Force exhaust - wide open she really booggies - lol
EZ

(Message edited by ezblast on March 29, 2008)
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Toniportray
Posted on Saturday, March 29, 2008 - 08:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I second the notion.
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