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Post by murkyapricot on Dec 17, 2015 13:24:05 GMT -5
I have done it its a royal pain, I would not try to do it in the bike again. John Alright that's good enough for me, if it's a pain for you, it's going to be a disaster for me, I'll just go ahead and do it the easier way ☺ |
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Post by murkyapricot on Dec 17, 2015 9:37:25 GMT -5
Has anyone rebuilt a top end without removing the engine? Seems like it would save me considerable time, but I'm worried it might make it too difficult
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Post by murkyapricot on Dec 11, 2015 23:01:33 GMT -5
Is there a link anywhere showing a good vs bad piston? I'm not really sure start type of wear im supposed to expect, or how to pin point what was causing the issue
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Post by murkyapricot on Dec 11, 2015 19:27:52 GMT -5
Also I've watched a few videos on replacing the piston, they never mention if you need to drain the oil first or not.. so I'm assuming no?
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Post by murkyapricot on Dec 11, 2015 10:20:35 GMT -5
Would it be smart at this point to just order a top end rebuild kit? It seems like this is what the problem is pointing to
Sorry for so many questions, but if I do rebuild the top end should I go ahead and replace the valves as well? Id prefer to spend as little as possible, but most importantly I want to fix it the correct way so I want to make sure I get everything I need.
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Post by murkyapricot on Dec 11, 2015 0:00:34 GMT -5
no compression it won't start you need to inspect valves make sure they are both closing on compression timing mode if you find its right pull head check head gasket if blown if ok pull cylinder off check cylinder for damage and look at piston for broken rings. How do i know when they are closing? |
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Post by murkyapricot on Dec 10, 2015 21:15:29 GMT -5
I did and i didn't get any reading
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Post by murkyapricot on Dec 10, 2015 20:57:26 GMT -5
Ive also noticed when i spin the variator by hand i can hear a light air blowing sound, is this normal? As I'm spinning it the resistance changes, at certain points it's difficult to spin then when it loosens up that's when i hear the air sound When the piston is going up it is harder to move because it is compressing air, when it goes down it is easier to move, that's normal. Have you checked the hoses and carb for vacuum leaks? To do so, get a spray can of carb cleaner, if you manage to get the scooter on, spray some carb cleaner over the hoses, intake manifold and carb, if you hear a change on the engine, that's where your vacuum leak is located. NOTE: Have a fire extinguisher handy, the carb cleaner can catch fire when it gets in contact with the hot spots of the engine. The problem is I can't get it to start at all I already cleaned the carb connected all the hoses, that's one of the parts I'm very familiar with All it will do is what it does in the video |
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Post by murkyapricot on Dec 10, 2015 19:05:05 GMT -5
Ive also noticed when i spin the variator by hand i can hear a light air blowing sound, is this normal?
As I'm spinning it the resistance changes, at certain points it's difficult to spin then when it loosens up that's when i hear the air sound
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Post by murkyapricot on Dec 10, 2015 19:02:56 GMT -5
did you squirt some fuel in? Yes right in the intake manifold vac line, still doing same thing as video |
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Post by murkyapricot on Dec 10, 2015 18:34:08 GMT -5
Remove the kick starter to discard that as the failure, it can run fine without it, if that is not the issue, just put it back on, it is probably out of place, that's why it is stuck. I agree.... If you are getting spark, and the piston moved when you rotated the variator, electric and seizure problems can be eliminated. Sounds like the kick starting teeth somehow became misaligned. Remove the kick start to simplify the mechanics. Removed the 2 kick starter gears no change |
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Post by murkyapricot on Dec 10, 2015 7:35:40 GMT -5
Thanks! That's a good tidbit of info I must have missed So thats good news then,I'm really dreading the day I need to open up this engine. Hopefully it's all related to this stuck kickstarter These engines are very simple, they function pretty much like a bicycle, but instead of pedals you have the piston, and instead of gears you have the variator and the clutch. Awesome thanks, then I guess I should pick it up fairly easy considering I am a bicycle mechanic lol |
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Post by murkyapricot on Dec 9, 2015 23:06:59 GMT -5
This might be a stupid question, but how do you know the piston moved? Sorry I'm still learning If the variator moves, the piston does as well, it is directly attached to the piston rod. Thanks! That's a good tidbit of info I must have missed So thats good news then,I'm really dreading the day I need to open up this engine. Hopefully it's all related to this stuck kickstarter |
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Post by murkyapricot on Dec 9, 2015 22:09:07 GMT -5
Remove the kick starter to discard that as the failure, it can run fine without it, if that is not the issue, just put it back on, it is probably out of place, that's why it is stuck. I agree.... If you are getting spark, and the piston moved when you rotated the variator, electric and seizure problems can be eliminated. Sounds like the kick starting teeth somehow became misaligned. Remove the kick start to simplify the mechanics. This might be a stupid question, but how do you know the piston moved? Sorry I'm still learning |
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Post by murkyapricot on Dec 9, 2015 10:57:57 GMT -5
Ill try that, I also have a spare carb I can put in
My concern is that it is something more serious due to the kick starter being stuck, I don't know too much about the internals but I know the kick starter used to work, now it goes about 1/4 of the way down at most and needs to be pulled back to original position
I'm at the point where I've checked everthing I know how to and am just scratching my head about what to do next.
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