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Post by SqUiRmInAtOr/ Phred 501 on Dec 11, 2005 10:34:03 GMT -5
Fially got around to installing new air fiter mount. Short 45 tube (maybe 2-1/2"s) just fits beween carb & fender. Came with plastic covered gauze filer that won't fit without the platsic cover hiting the fender.(Used old gauze filter w/no cover, new filter on carb diaphram inlet hose and a little gauze filter on crank breather hose) Runs medocor until it's warm when a bogging engine stutering kicks in @ upper 6Krpm. What ya'll think. Tried blocking filter with varied sizes of duct tape didn't help maybe worse. Have yet to check fuel filter and am considering larger main jet. Figure short air tube has increased air to carb so maybe need more main??? I'm @ a .90 now and the temp. is around 25f. YOUR THOUGHTS GREATLY APPRECIATED!!Oh yeah, Snow's a BLAST!!
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Post by chanito on Dec 11, 2005 22:52:10 GMT -5
 90 seems big enought to even run without a filter, so i doubt that is your problem, maybe a shim would help, also check the vacuum line to the pair valve, it might be leaking
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Post by SqUiRmInAtOr/ Phred 501 on Dec 12, 2005 5:42:55 GMT -5
90 seems big enought to even run without a filter, so i doubt that is your problem, maybe a shim would help, also check the vacuum line to the pair valve, it might be leaking Thanks Chanito  I'ved had the PAR engine port plugged since I removed the air box and shimmed the needle soon after. Must have someting to do with the shorter intake tube. ???It's the only component that changed. |
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Post by chanito on Dec 12, 2005 6:57:27 GMT -5
So what did you do with the little vacuum line just betweem the carb and the head that supplies vacuum to the pair valve by the air box?
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Post by Dandy Dan on Dec 12, 2005 7:52:03 GMT -5
Where did you get that short intake hose?? Is it one of those nice ones from Tokyo-Parts etc or is it just a straight tube? If you don't have that mushroom shaped lump maybe that's the problem. A CV carb needs smooth air.
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Post by Kami no Chiizu on Dec 12, 2005 20:33:33 GMT -5
I missed that line about snow. I now hate you.  |
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Post by SqUiRmInAtOr/ Phred 501 on Dec 13, 2005 13:30:33 GMT -5
So what did you do with the little vacuum line just betweem the carb and the head that supplies vacuum to the pair valve by the air box? been runnin with just a breather & diaphram inlet since I took off the box. (per BS inlet tech) Gotta check that fuel filter maybe tommorow, sucks not being able to ride. |
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Post by SqUiRmInAtOr/ Phred 501 on Dec 13, 2005 13:38:39 GMT -5
Where did you get that short intake hose?? Is it one of those nice ones from Tokyo-Parts etc or is it just a straight tube? If you don't have that mushroom shaped lump maybe that's the problem. A CV carb needs smooth air. Can't remember the name of the place but It's on here somewhere. The tube slips over the carb mouth (barely then sweeps up 45 deg. with the filter mount lip right behind it. Filter just fits before hittin the rear fender. No inlet tubbing hole, just a short curved tube with the filter groove (sightly mushroomed) on one end. Pix tommorow, GOD WILLING |
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Post by Dandy Dan on Dec 13, 2005 14:19:43 GMT -5
Why don't you try using the stock hose until you get it running good and then switch to the shorter one to see what kind of an effect it has? That way you can rule out the lack of a mushroom as the problem.
You said it runs worse when it gets warm. Usually this in an indication of a rich engine because as an engine heats up it vapourizes the fuel more effectively so in essence you get richer. The idea is to have it so that it's lean when it's cold and then as it warms up it gets perfect. This is the reason we have the start enrichment valve to make up for the trouble the carb has when it's cold.
My best guess however is that your problem is largely caused by the short tube with no mushroom and as your airflow increases it's just too turbulent to mix with the gas evenly thus a poorly burning mix. Less gas might not help you if you are still using the short tube because the 90 perhaps might be the bare minimim for turbulant air like you might have as it doesn't mix as well. You might be back in business if you go 85 with the stock tube.
Also check the hose coming out of the left side of the carb. This hose is important because it lets the air in which regulates your needle height etc. This hose doesn't need clean air if you are just going to run it for 5min without a filter but make sure that the hose is uninterrupted and free flowing.
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Post by chanito on Dec 13, 2005 19:40:23 GMT -5
The pair system uses thre hoses, two of about 3/8" diameter that feed fresh air to the reed valve in the head, one gets this air from the side of the fuel tank, goes to the pair valve, located on the air box, were it feed a dedicated air filter, then the other hose takes this filtered air to the head (thru a reed valve into the exhaust), but this pair valve is actuated by vacuum supplied by a small hose coming from the intake, i think this little hose might be leaking, make sure you capped this fitting at the intake
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Post by SqUiRmInAtOr/ Phred 501 on Dec 14, 2005 7:55:15 GMT -5
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Post by Dandy Dan on Dec 14, 2005 8:09:47 GMT -5
Wow, that filter is BROWN! I've got 17,000 miles on my scooter and it's no where near that dark. I'd swap that out. Also, congrats on matching the filter color with that text perfectly  I do think your filter hose is too short. I love the look and I wanted to do it too but CV type carbs need smooth air to run nice which means a longer tube and a mushroom thing to buffer stuff out. Try it with the stock tube and replace the fuel filter and I'd guess you'd be back in business. If you can get things to work well with that short tube that's be great news though cuz it's such a clean and sexy look. |
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Post by SqUiRmInAtOr/ Phred 501 on Dec 28, 2005 8:53:34 GMT -5
Got that nasty fuel filter swapped and gave er a run w/ the short tube. Dandy's correct (per usual) it just don't work. Runs fine up to about 65k then everything goes to [glow=red,2,300]hell.[/glow] Also, noticed idles real fast and is considerably louder. Sooooo.... reinstalled the stock intake tube with the shorty 45 on the end + the nifty weather covered gauze filter on the end. On the road again!! Thanks for all the imput men! ;D
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Post by Dandy Dan on Dec 28, 2005 9:11:19 GMT -5
65km/hr isn't that bad. How fast were you going before? The short tube is likely louder cuz it muffles the sound less...I'm glad to hear that you got her going again but it's too bad the shorter tube didn't work out cuz they look so rad. I really want to use one but no one seems to be pulling it off very well.
Also, why is my name written in purple??
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Post by SqUiRmInAtOr/ Phred 501 on Dec 28, 2005 20:22:05 GMT -5
65km/hr isn't that bad. 6k-rpm or 20mph is pretty bad Also, why is my name written in purple?? Purple indicates a person of high rank, royal, reagal. IN YOUR CASE, WEALTH OF KNOWLEDGE AND REASON |
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Post by chanito on Dec 28, 2005 21:48:21 GMT -5
65km/hr isn't that bad. 6k-rpm or 20mph is pretty bad Also, why is my name written in purple?? Purple indicates a person of high rank, royal, reagal. IN YOUR CASE, WEALTH OF KNOWLEDGE AND REASON Yeah! you earn the purple DD  What? You were thinking Teletubbies? |
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Post by Dandy Dan on Dec 29, 2005 7:50:21 GMT -5
Yeah I was thinking teletubbies...
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Post by timberwolfmadcat on Jan 5, 2006 15:19:03 GMT -5
So many filters, by god squirel, whatdya need 3 filters for, LOL
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Post by SqUiRmInAtOr/ Phred 501 on Jan 6, 2006 17:04:39 GMT -5
So many filters, by god squirel, whatdya need 3 filters for, LOL It's not what you need, it's what you have. The little one is the crank breather. You could just let it blow oil on the ground. The carb throat and the diaphram do need clean air. I used to run a T and connect all three off the one befroe I bouught the covered one that came w/ the 45 degree booty. I like the 45 cause I can turn the filter up and ride in the rain without sucking water.I didn't like the carb breather bowing in my carb intakes. My current set up has the main carb airfilter hanging on the stock tube lust over the kick start peg. Covered and turned up I can ride in the rain without sucking water as I have in the past. I use my origional gauze filter for the diaphram, strapped to the rear fender under the seat where it won't get wet either. The little job on the crnk. brthr. hose just looks better than none at all and keeps the splunge off the ground and out of my carb. I didn't "LOL" when I saw your abused exhaust stud. |
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Post by timberwolfmadcat on Jan 8, 2006 23:31:47 GMT -5
Aren't the crankcase vapours supposed to go back into the carb?? Thats just what i thought. Whered you get that nifty little filter for the crank breather hose
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