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Post by Thebatman on Mar 8, 2011 12:30:01 GMT -5
Well, now i am back to being a brand new noobie......
Not firing now, just keeps soaking the plug... even with the line off...
The thing started this a.m, days like this make me want to sell all the scoots cept the ag.... it runs
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Post by 90GTVert on Mar 8, 2011 19:37:28 GMT -5
Might be worth checking the reeds if you can't find any other reason for the fouling. I had a similar experience to what you are describing after a reed broke.
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Post by Thebatman on Mar 8, 2011 19:43:10 GMT -5
That did cross my mind, but of course i didnt think it would/could be a issue since it started before....hmmm, maybe i will take that off to look..
I had this thing airing out for HRS. today, 3 plugs soaked at the flip of the switch.
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Post by 90GTVert on Mar 8, 2011 20:03:45 GMT -5
I had to air out the crankcase because there was so much fuel when my reeds went. Just like you said, turn the engine over for a second, check the plug, soaked.
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Post by Reign on Mar 8, 2011 20:31:05 GMT -5
I had this exact same problem with mine after I rebuilt it. It ended up being the reeds. I had switched over to carbon fiber when I put it back together and for some reason a bubble was forming when the reeds opened. After I threw the stock reeds back in, it started on the first try. I'd definitely check there first. It's just a quick 4 bolts, anyhow.
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Post by Thebatman on Mar 12, 2011 10:29:13 GMT -5
Good morning guys... The other day it was suggested to check the reeds by several of you.. This a.m i took it off and to my surprise, there are carbon fiber reeds in here.. I know good and well, kymco didnt do that.. surely???..(the zx had steel reeds). Anyway, one side isnt sitting flush, only one reed is sealed. HEre is a terrible pic to see.. At least a .5-1mm gap on the one side... I happen to have a cpl but can you use different thickness for each side? Downfall to that?. If i cnat go any of that, i guess i'l try to flip them over and see if they seal better.. BUT, i remember brent saying something about seeing them NOT seal all the way... Thanks guys for any input on this one...(waiting on a few parts, so i may a swell try and crank the cobra again... ;D)  |
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Post by Thebatman on Mar 12, 2011 13:20:33 GMT -5
Hey guys.. I'm sure most of you are out riding today.. oops, well it's nice here anyway.. Anyway, i had ordered some malossi reeds, they came in a pk of 6.. 3 different thicknesses. How do you know what thickness you want? I remember z always saying use the .028in.. These measure .26?mm,30?mm, .38?mm.. the spare reed i have didnt seal up the block either so i opened the malossi.(had gotten them for the s9, but didnt realize it had 3 sets inside..). I was thinking of saving the .28? for the s9..(the zx oem was real stiff but the were steel)... Thanks for any input guys..... (i swear i'll get my rides going. :rofl: , (figure i'd sell this scoot to by .even more parts for the s9.. :  |
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Post by Thebatman on Mar 14, 2011 7:54:44 GMT -5
Good morning guys. well, i had her running..  .. I left it idleing for a long time, started putting the front on, got a pipe on. The 7g rollers actually seem to light. I thought that'd be a good spot. I had a high rev at idle.. Started turning screws, she finally died out and wouldnt crank back, so i left it alone at that point.. :lol: ..A high idle(4g) is from mix, correct?... maybe a air leak to tho huh?. The carb, intake didnt leak. I had just enough carb cleaner for that. ... Also, does anybody use anything besides carb cleaner and air to clean carbs.(can's of cleaner get $,1-2 cans a shot) @ 2strokd... You can answer this maybe... What turns are your mix, idle at? Also, the rollers(8.5 oem,7 should be better)?.....(unless either's not oem) |
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Post by 90GTVert on Mar 14, 2011 8:19:48 GMT -5
Not sure how I missed this yesterday? I use carb cleaner and air to clean carbs, nut not 1-2 cans per cleaning. I feel your pain on paying for carb cleaner (brake cleaner too), but be more sparing with it. There's no way you should need to get near using 2 cans per carb clean. Unless the carb is hideous, part of 1 can will do it easy. Pull the jets out and blow them out first and look through them and then spray them quickly with carb cleaner. Blow out the air passages first, then give them a small shot of cleaner. Stuff like that rather than just dousing them in chemical will save you a lot. Also, I use an all purpose cleaner (whatever I can pick up at the dollar type stores for like $5 a gallon. To wipe down the outside of the carb and all that stuff rather than using carb cleaner. If you aren't already, check those dollar stores and Wal-Mart for brake and carb cleaner. Gumout runs up to $4 something a can here for carb cleaner, but Wal-Mart sells Super Tech for just over $2 a can. Sometimes the big parts stores have sales too. I know Advanced was selling brake cleaner for $2.00 per can last summer so I bought 10 cans (all they had left). Pays to stock up on that stuff when you can get a deal IMO. The high idle may be a leak. May be partially mixuture adjustment. I can't say I usually see 4,000RPM idle from a scoot that doesn't have anything else up though. May be that you've got the idle screw in too far. It is OK to use two thicknesses of reeds. Enviromoto posted that Polini recommends it. Polini recommends using a .35 on the engine side and a .30 on the intake side of the reed cage. In fact that's how they sell their replacement reed sets for the Zuma 50. They say it helps with the pulse of the engine keeping the engine side from fluttering as 2t said, and improves throttle response. |
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Post by 2strokd on Mar 14, 2011 11:12:41 GMT -5
I missed this too.
Im running 7,s i think?. Or real close! They tend to like between 7-9g with the stock contra in my experience. My idle/air is about 1-1/2 out from seat. Also, mine idles high until its warm. If you start it and walk away it will idle around 4-5grand until i burp the throttle or it warms and loads up.
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Post by Thebatman on Mar 31, 2011 12:03:00 GMT -5
Good morning guys.. I am recleaning the carb on this cobra. Have a new reed cage i'm gonna try for the sake of argument and see if any change but my dumb ? is, on the pilot jet hole, can you see all the way thru the carb like you can on the mj?.. I am using the "torch tip" cleaners and the smallest one will not go thru. even a piece of single strand wire is hitting something. I know the atomizers on the pj may obscure light but it's out right now and i still cant see a thing... Any input will be greatly appreciated....
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Post by 2strokd on Mar 31, 2011 12:42:20 GMT -5
Pilots are the biggest B!tch to clean and the first to clog cause they are so small. You can boil em out.
Or burn them out with a propane torch. They are a pain because the holes get so small on em.
But yes you need to see light through the whole jet. If not, thats the problem.
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Post by Thebatman on Mar 31, 2011 13:12:31 GMT -5
Thanks 2strokd, i actually had meant in the carb body, not just the jet..
I can see thru the jet itself, small ass hole.(#35?)
Now i have no power..hmmmm
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Post by Thebatman on Apr 2, 2011 7:06:02 GMT -5
Good morning guys... Went and tried playing with the cobra some yesterday.. Hoping that my compression tester is a P.O.S, I went and installed a new piston/rings, "cleaned" the bore with a 320 grit ball hone.(still has cpl scratches). I did rub my finger in oil, so the cylinder wasnt dry. Tried cleaning the carb again. I have great spark.., plenty of gas,..compression was low according to MY tester.(every scoot i try it on, it's low)...
I have the mix screw at 1, idle at 2. Put all back together and cranked it. Started right up, but died 4 seconds later. Wouldn't hit again..... even have a br8 plug in it...... What am i missing here? Where am i fkn up?.... Oh, even has a brand new reed cage(oem) i ordered for the s9...I have my zx carb or the arreche but i'd had to figure out the throttle cable swap..that's new too..lol)
It does seem that the bearings have some play in them...(crank) Couold bad bearings keep it from starting and running?.. Remember, this thing ran in the yard for a LONG time cpl weeks back.. even rode in yard..... What am i miossing?...
Thanks guys for any input.........Need to get rid of this oone so i can buy more stuff for the S9... :lol: :no:
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Post by 90GTVert on Apr 2, 2011 9:11:26 GMT -5
My compression tester used to give low readings on the scoots. It came with a rubber o-ring type of seal where the fitting meets the head. I took that off and put the washer from a spark plug on instead and it's worked fine since. Might be worth a shot. I don't think compression is your issue here though.
Bad bearings shouldn't make it start then die. Bad seals maybe. So you have tried another carb on it?
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