300cc Loncin eng

[DesertDog]

taking shots as i go , found out i did'nt have to remove the clutch at all, two bolts holding the cam gear on took em off the gear came off the cam , took the chain off,
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i will need a know-it-all to help with the puting timing back in place.
i'll follow your tip on that.
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the piston looked burnt (scorched) down the side near the top, inbetween the first ring and the second, is that normal ?,
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piston wall (sleeve) looked very scratched, smooth, but all kinds of swirl scratches, going this way and that, in a downword spiral, is that ok ? yes this the first 4 stroke single cylinder i've tore into,
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so i guess i will need to order rings, and a clutch cover,

will post pics when all done and i can get parts,
thanks Vince and kato

[VinceDrake]

If it's very low hours on it, yeah, you're going to see some uglies between the top compreshkin rings. (At least that's what I commonly see on auto engines) Mainly as they are still sucking some oil up there, and then in burns and oxidizes and stuff. I think....

One test that might be a good idea though, set the head upside down, with both valves closed, and fill up the combustion chamber with gasoline, or brake cleaner.

The valves should be gas-tight for at least a good 10 minutes. Just to make sure it hasn't got a very small leak in an exhaust valve.

(Just for safeties' sake.)

--Vince

[DesertDog]

found this under dealer discution, on the thread of sunnysports
sounded simular to what i found today
comments by montanaoffroader
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Actually, when we pulled the head and cylinder off, we found that the rings were stuck in the piston and the piston looked like it had been dragged down a gravel road! The valves were fine.
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[DesertDog]

ok parts dealers, where are you ?
before i hit the never ending web on dealers that say they have parts,
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> i want to give chinarider dealers the first come on my order, i know i'm a dealer but i dont have a direct link to my supplier anymore, he burnt me and , now its over.
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i need to get piston, piston rings, valves, and a clutch thingy ,where the clutch plates go on the inside and bolts to.

for a 300cc Loncin engine, its tore down and i need to get the parts ordered, so tell me what you want to know first,

pm me if you want or ask here so all can watch and learn from my mistakes.

DD

[DesertDog]

ok :wink:
i know when i'm not wanted :?
to THE Internet i go
BRBRBRBRBRB

[VinceDrake]

I wonder what the heck happened to it to make the piston/rings look that bad? Hmm.

Maybe someone in the QC department had to poop or something and that one got through....

Sadly, I only do car stuff-- No bikes/ATVs-- Although, I have a really Nice set of Yamahoe RD350 2nd over pistons I could sell ya' if'n ya' want!

--Vince

[DesertDog]

yeh vince ifin they'll fit , wut'll i do measure with a caliper, the piston thats on there is probly good, but i will change the rings and valves, thought about changing the head if i could, for a bigger piston ,?
it'ld be sweet if that yammy 350 would fit.
DD

[winnipegmike]

So...how does this story end? Is it working now?

[DesertDog]

yes as the story goes 8) , so do the days of our lives 8O

i will no more on july 14th if the parts came in from china to www.loncin.ca , i ordered thru them and it has been a trying time,

so nothing yet will post any (news) on parts delivered, and attempted assembly being planed .

[DesertDog]

it has been a pleasure to have talked and done some typing and emailing
but life has ended for me

good by

[winnipegmike]

Originally Posted by DesertDog

it has been a pleasure to have talked and done some typing and emailing
but life has ended for me

good by

What does this mean???