Clinician
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Post by skikman on Sept 13, 2011 5:07:29 GMT -6
I think Will has you figured out on the spark problem. Which wire is giving you the .04v? the green wire going to coil.there is a 3pin connector coming from stator and each one is reading 0.19 when pushing starter. |
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Clinician
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Post by skikman on Sept 12, 2011 17:10:56 GMT -6
hi folks.i just bought a speedfight 100 cheap as it needed a new piston and barrel.i have a spare engine with a good top end so put it on.i now have good compression but no spark.i've tried different plug,coil,lead,cdi.i dont seem to be getting enough power going to coil as it only reads 0.04v[when pushing start button] with multimeter to green wire at back of coil.the red light flashes all the time key in or not.i got 3 keys with the bike 2 black and 1 red.1 black opens seat,the other turns ignition and the red 1 opens the thing at the back.not sure what its for[started to pull it out but pushed it back in again]now i read that you can reset the key by turning it on with the red key but mine wont turn the ignition.so has anyone any ideas as what i need to do or try.
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Clinician
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fuel tap
by: skikman - Sept 9, 2011 12:35:13 GMT -6
Post by skikman on Sept 9, 2011 12:35:13 GMT -6
Yes you need a plug in it. You are not creating a vacuum at the intake because it is drawing the air in through the plug hole. Roy great.thanks thought/hoped so. |
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Clinician
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fuel tap
by: skikman - Sept 9, 2011 11:35:22 GMT -6
Post by skikman on Sept 9, 2011 11:35:22 GMT -6
will a vacum fuel tap work[put fuel to carb]if i have no spark plug in?the reason im asking is i am putting a speedfight back together but no plug for it yet and when i turn it over no fuel comes out the carb end of the pipe,but when i suck the vacum pipe fuel comes out the carb end.do i need a plug in for this to work?
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speedo
by: skikman - Sept 5, 2011 14:42:07 GMT -6
Post by skikman on Sept 5, 2011 14:42:07 GMT -6
You need to check the hub at the wheel and make certain the cable is fully screwed into the speedometer in the dash... There are a couple of different types of cable... you have the wrong one.. check your new one with the old one i dont have a new cable the old one is ok[turn one end and it turns at the other end]it is screwed in fully at the clock and cable inserted and screwed/locked at the hub.im thinking is there something missing at the wheel end? |
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speedo
by: skikman - Sept 4, 2011 16:22:44 GMT -6
Post by skikman on Sept 4, 2011 16:22:44 GMT -6
hi folks.i have a chinese scooter and the speedo is not woking.the cable is ok and the clock seems to work as i put a speedo drive on[that looked the same]of a honda cg125 and it was reading i was doing 75mph.i think thats because of the wheel size.anyway i got another one of a similar chinese scooter on ebay and tried it and it only moved the clock for a wee while then stoped.both the old and new speedo drives turn ok.i mean the end where the cable goes into turns when i turn the cog in the drive if you know what i mean.am i missing something?
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Post by skikman on Aug 10, 2011 16:33:25 GMT -6
So if the gears are the same for a 16" wheel and a 10" wheel, where do the different speedo systems adapt for the difference in the rotation speed? Is the speedo head specific for a certain size wheel so it reads correctly? A 10" wheel is going to turn a helluva lot more times in one mile than a 16" wheel. Rich a 10 inch wheeled scooter and a 16 inch wheeled scooter use the exact same speedo drive hub, then the compensation would have to be in the speedometer head. What I was trying to tell Skikman was that if the drive unit he was looking at was the exact same as his old one it wouldn't change the reading on his speedometer regardless of the one inch difference in wheel size. Sometimes I see what I want to say in my head but it doesn't come out clearly.  well i did put one on of a honda cm125 and it was reading way to fast 70mph +.i was just wondering about the 1" difference |
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Post by skikman on Aug 10, 2011 12:32:29 GMT -6
hi.i need a speedo drive for my chinese 50cc scooter with a size 13 wheel on the front.i can get a speedo drive that looks the same off another scooter but with a size 12 wheel.will it read right on the clock?
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Post by skikman on Jul 27, 2011 13:54:52 GMT -6
Are you getting adequate fuel flow? If there's a blockage at the tank, filter, or lines it will hold your top end down. The second thing I would check is the diaphragm under the brass cover on top of the carb. If it has a hole in it the needle won't lift like it should. There's explanations for these problems in the library under "air, fuel, and carb". Let us know what happens. Rich think i have it sorted.i checked the valve clearance and they were tight so i set them to 0.05 and it's running alot better.thinks for the tips |
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Post by skikman on Jul 27, 2011 5:53:55 GMT -6
hi folks.i just bought a wee chinese 50cc 4 stroke scooter[secound hand 08] and it dosent seem to rev up to get full speed[only getting 25-30 mph].even when its on the stand its revs so far then just kinda goes up and down.i have taken off carb and air filter,cleaned and blew them out though they were quite clean.also i have taken off exhaust and blew compressed air through it as well.i tried also a new spark plug but all to no good.can someone tell me what next i should try? it can hardly get up hills.
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im beat
by: skikman - May 9, 2011 16:19:35 GMT -6
Post by skikman on May 9, 2011 16:19:35 GMT -6
hi folks let me try to explain.4 or 5 months ago i bought a non running suzuki ay50 katana[2 stroke water cooled].the head gasket had blown i was told so i took the head off and sure enough there was water in there.i took the barel off to check the piston and broke one of the rings.it was nearly as cheap to buy a whole piston kit so i did.put the new piston in and it had good compression but it would not start.it seemed to be a fuel problem as the plug stayed dry everytime i tried it.i cleaned and blew out the carb a 100 times to no good.i took the reed valve off and put it into a yamaha neos i had and it worked fine.i even bought another carb and manifold of ebay and tried it today still no good[still plug dry].tried it with air filter off/on,exhaust off/on,new plug[great spark]kicked it,shouted at it,what else can i do  |
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Post by skikman on Apr 6, 2011 17:18:11 GMT -6
Sounds more a compression issue if it was not sucking much when you put your hand over the Air Inlet of the Carb. The Carb can be dirty as heck but it should be drawing into the engine. So do like Sprocket said, take the plug out and put your finger in the hole and hold it and crank it. It should blow your finger off the hole if it doesn't you do not have much compression and your going to need some rings. Alleyoop it does seem to have enouigh compression with finger but why is it not sucking.carb has been cleaned and blown out.awell looks like the head and barel has to come off again somethings not right. |
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Post by skikman on Apr 5, 2011 16:06:12 GMT -6
Could taking the plug in and out have done something to the plug boot connection? I have seen this happen on chainsaws. Take the plug out... it works, put it in and it doesn't even cough... Also check that your engine and frame are grounded together... I spent a week with a guy that said he was getting a good spark at the plug. He put it in the engine.. nothing. Only after my hair went white, did I realize that he was grounding the plug to the FRAME. When he grounded it to the engine...NO GROUND... NO SPARK. So simple... thought you might have had it there with the ground to engine but sadly no.i just got back to looking at the wee bike today and i reconnect carb and noticed it was'nt pumping fuel into it[vacuum tap].i sucked on the pipe and still no fuel came out so took off tank and cleaned it out[lots of **** in it]put it back on and sucked the pipe,fuel came out.happy days i thought but when i connected the vacuum pipe to the carb and turned it over nothing came out the end that fills the carb.i then put my hand over the airfilter side of the carb and it was'nt sucking that much when turning it over.somthings not right there.thats the point when i threw the tools down and came home |
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Post by skikman on Mar 31, 2011 11:43:26 GMT -6
hi folks.i have a wee suzuki 50cc katana scooter that i replaced the piston and gasket on some months ago[water in head so take it blown gasket].i put the engine back in today.it has good compression and a good spark at plug.it would'nt start.so with the carb off i tried to fire it up by spraying fuel straight into the inlet while turning it over.[it should start and rev up]but no go.so then i tried putting some fuel into the plug hole,putting plug back on and trying but still no go.i know the reed valve is ok as i had it on another bike.the plug is new and ive tried 3 others.cap and ht lead seem ok as well.anyone have any thoughts as what i should try next. the fuel is fresh.
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