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Post by daddyeby on Jan 6, 2007 17:13:48 GMT -5
I think you may have a good piont. The wiring from trigger coil on the engine from a wildfire 50cc included a ground that Dawgs old scoot did not I did not connect it to anything so a grounding problem very well could be it. I have to agree over reving the engine might blow the engine but I dont see how it could do anything to the CDI electronics operate at speeds that are far faster than a motor would ever reach. The problem does seem to be related to either to much fuel or the timing being slow. And the second maybe due to a poor ground. I will check all grounds as soon as possible. Even if it dont correct the problem it is something I should have taken care of in the first place. Thanks for the info. Here is some karma thanks for looking.
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Post by daddyeby on Jan 7, 2007 21:00:25 GMT -5
Well the scoot is down had to things happen today. On the way into work the choke close twice while going down the road. Then after work it blew a seal on the variator side. The bearing is feels good. I thought I heard a pop and then the belt started slipping. Good thing it happen on that side . I will have to replace the seal before I can do anything else.
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Post by daddyeby on Jan 7, 2007 21:33:34 GMT -5
Oh by the way I moved the crank case vent I guess I may have piniched it off.
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Post by sussexscooterhead on Jan 8, 2007 16:29:52 GMT -5
Sorry to hear about your rotten luck.
Hopefully others will read this and realize the importance of the crank case vent.
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Post by haywire17 on Jan 8, 2007 17:23:39 GMT -5
does anybody know the proper gear alignment on the 80cc camshft,does the center large hole in gear line up with the key way slot on the shaft, i installed the 80cc kit which is actually the 72mm bore and had trouble with it running it kept spitting out fuel back through carb at higher rpm's, so i compaired the new camshaft and the original one ,the original camshaft hole is lined up perfectly with the key way, so i reinstalled the old cam runs good but i have carb troubles,is the new cam made this way for the 80cc kit or did the gear just get missaligned? ?
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Post by daddyeby on Jan 8, 2007 19:56:44 GMT -5
hhvacman61 Look at the download on the scoot dawg site a picture is worth a thousand words.
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Post by daddyeby on Jan 8, 2007 20:14:09 GMT -5
I hope that it was the vent I dont know the scoot is still at work. I straped the vent to the frame with zip ties but I may have either pinch ed it off then or got it under the seat. It sure sounded like it blew the seal out. (the pop I heard) I did remove the cvt cover and the bearing feels good no wobble at all. But I did not have time to pull the variator. I tired to get a seal today at a auto parts store they have some close but not go.
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Post by haywire17 on Jan 8, 2007 21:24:00 GMT -5
thanks daddyeby that sums it up the one that came with the kit is incorrect,i used the old one but still could not get any high rpms out of the engine it would just spit and sputter and throw gas back out the carb would not go over 6000 rpms so i pulled the cylinder head back off and compaired it to the old one wow what a difference the old cyl head has a much bigger exhaust port than the new one. old head measured 22mm vs new at 19mm looks like a full port and polish is in order. i have tryed running it with the exhaust off no different,i even rejeted from my stock jet of 90 to a 85 still no good,spitting gas out of carb was better with 85 but still not good enough pilot jet is 35,ill see what happens after p&p, this kit is driving me buggy something soo simple really turned to a bag of *hit . Please anybody that gets an upgrade kit make sure your camshaft is in line properly this little mismatch caused me such a head ache and lead me down the wrong trail,compression test would not pick it up.will write back later
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Post by daddyeby on Jan 8, 2007 21:30:15 GMT -5
I would put the old head and cam back on and try that.
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Post by haywire17 on Jan 8, 2007 21:46:57 GMT -5
yea i though about that but i think the valves might hit the new piston,plus it would raise compression probably quite a bit,looks like the valves sit closer to the gasket surface than the new head, i know the distance from the outter parts of the valves on the new head are wide than the old one, the 50 cc head was part of a limited edition scooter, the valves are the same size in both heads,the new head has heavier valve springs than the old one,come to think about it the springs have more coils than the 50cc head, i will know more when i get it apart
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Post by sussexscooterhead on Jan 8, 2007 21:56:54 GMT -5
Hi Hvacman. Welcome to the forum!
Can you maybe start a new thread with your topic? More people will get to see it if it's not buried within this one.
Good luck with things!
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Post by haywire17 on Jan 8, 2007 22:13:07 GMT -5
i would love to but i dont know how, i mostly read the threads than post but felt this simple project needed a little more involvement with several minor problems causing all kinds of havoc
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Post by daddyeby on Jan 8, 2007 22:14:22 GMT -5
I miss read you post earlyer I thought the valves was smaller on the new one. If you are worried about valve clearance you could put clay on the piston and check it.
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Post by haywire17 on Jan 8, 2007 23:08:03 GMT -5
okay i found out how to post a thread so i started one under 80cc kit problems
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Post by daddyeby on Jan 9, 2007 17:41:40 GMT -5
Well I had a few mins today at work to look at the scoot sure enough I got the crankcase vent under the edge of the seat piniching it off. I always knew the engine needed to vent but in the case carelessness got me.
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Post by daddyeby on Jan 11, 2007 16:06:47 GMT -5
Well I went to work today on my day off to work on the scoot. The seal was just blown out ant was in good shape. I reseated it cleaned the oil off everything as well as I could refilled it with oil and away I drove. Sussexscooterhead good call! One of the things I was doing when I moved the vent was checking all the grounds. This miss is gone. I am going to get a few new plugs and work my way back up the high speed jets. I may have to replace my drive belt I am still getting a little slipage on take off but maybe the oil will burn off after a little driving. But we have some nasty weather coming this way so it will be a few days before I will be doing anything.
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Post by sussexscooterhead on Jan 11, 2007 22:47:55 GMT -5
That's great news!! You probably saved things by shutting it down right away.
I think for the price of a belt it's worth replacing it.
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Post by daddyeby on Jan 15, 2007 13:10:49 GMT -5
When the weather breaks I have a few more mods in the works. So stay tuned most are not to increase power but I think you all will find them interesting. One I am going to do today its one I can do without going out in the cold and Ice. I also got a bike speedo to take the guess work out but its to nasty out to install or try out.
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Post by daddyeby on Jan 15, 2007 16:45:09 GMT -5
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Post by perrym on Jan 15, 2007 17:01:32 GMT -5
BRILLIANT!!!!!!!!!!!!!!!!!! Using a meat thermometer for an oil temp. guage. How will you be able to look at it while riding. HEHEHE!!!!!!!!!! And did you make a mark the full line?
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Post by daddyeby on Jan 15, 2007 17:04:09 GMT -5
Yes it dont show in the photo but I used a dremel tool to put a light ring around the shaft at the full mark.
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Post by sussexscooterhead on Jan 16, 2007 9:17:53 GMT -5
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Post by daddyeby on Jan 17, 2007 8:12:38 GMT -5
Sorry some how I must have missed it but its a good ideal. Next is a way to measure cly temp.
Sussexscooterhead I have a mod I have done that I think really improves accel but no one but myself has ever done that I know of and the only person on here that has been possitive about it was somecallmetim I made smaller dia rollers same lenth to keep them from cocking. I used three with three normal rollers. It made a huge differnce before the upgrades. I know it works and dont hurt anything I have about 200 miles on them so far.
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Post by tubbugs on Jan 21, 2007 11:31:04 GMT -5
Daddyeby, VDO makes a cyl. temp guage. I've got one in my aircooled VW. Runs about 100 bucks but works well.
Also, I bought an '01 Zongshen "ZS50" with a QMB139 50cc engine but it is not the GY6 style, rather, more like the old Honda 50 with the valve adjusting caps and the round cover on the side of the head where the cam is. I bought it originally for an exhaust to chop up rather than my new one but it's so complete that I figured I'd as before I waste it. It is missing the valves, so I'd need them or a new head. Is it worth fixing and can anyone tell me what engine it is an what will fit it? It has 16" wheels and was sold as a "Rocket" so running it should be pretty fast, especially with the mod expertise I've gained here.
Thanks in advance!
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Post by daddyeby on Jan 28, 2007 15:15:34 GMT -5
Tubbugs it would be nice for you to give a link to that. The oil temp toped out at 180 f. What does the temp so on yours? A qmb139 is a gy6 just a small block. So I do not know what you have.
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Post by earlwb on Jan 29, 2007 8:06:03 GMT -5
I do say that that idea of a meat market thermometer is a brilliant stroke if creativity. Way to go. If I remember right, the oil temp on my Harley Sportster used to go up around 240 degrees F in the summer, in city traffic. An oil cooler kept the temps under 220 though.
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Post by tubbugs on Jan 29, 2007 18:23:07 GMT -5
Here's the link to one of the big VW houses in California, Moore Parts Source, www.mooreparts.com/ They've got an Autometer that goes to 340 and the VDO like I've got that goes to 600. Since I've searched e-bay and see many on there from snowmobiles and outboards for much less. Thats probably how I'd go now had I known any better (and had e-bay 8 years ago!) Simple install with one wire and ring under the spark plug, separate wires if you want it lit. Wish you'd known what engine I have but maybe that's a sign it needs to get parted out!
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Post by daddyeby on Jan 31, 2007 22:32:35 GMT -5
I would take a couple pic and post it in its owen thread bet someone knows what it is.
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Post by charlieh on Feb 1, 2007 7:08:10 GMT -5
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Post by daddyeby on Feb 9, 2007 14:01:59 GMT -5
Well I havent done anything have to wait till it warms up some.
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