Bit of history...
Not had it long..was running great first few times. 112kph on the speedo (58mph real speed gps)
Next few times out started surging at top end. Would give the full beans sometimes and sometimes hold back and only do 90kph on speedo and dropped about 400 rpm.
Next and time out...wasn't giving the full beans at all. Just 90kph max.
Now, I suspect if I didn't know what it was like the first few times out, I would be none the wiser and just think that's what it's like and all is ok. But I knew it just wasn't right.
So thought process was...fuel or spark problem.
Replaced plugs, filter and fresh fuel after draining tank. Seemed to be ok but water was choppy and flat out speed tests weren't really possible.
Last time out it was just the same. 90kph and noticbly more sluggish out the hole.
So tonight (at 10pm) I did what I had been avoiding since buying it....a compression test.
Now, I did this dead cold, because it was late and didn't want to annoy the neighbours.
Rear cylinder was 120psi and forward 95psi.
Fearing the worst here, but I will go to sleep hoping that it's just because the engine is cold and lacking a bit of oil in the bores.....but in reality I know it's probably buggered.
It's likely I have a winter project on my hands and a top end rebuild.
Easy enough we thinking ? I hear that I can send away the liners and get the pistons sized and sent back. Would they hone the liners too ? Don't have any experience with these wee engines.
Any guides with pictures would be great !
Cheers.
Not had it long..was running great first few times. 112kph on the speedo (58mph real speed gps)
Next few times out started surging at top end. Would give the full beans sometimes and sometimes hold back and only do 90kph on speedo and dropped about 400 rpm.
Next and time out...wasn't giving the full beans at all. Just 90kph max.
Now, I suspect if I didn't know what it was like the first few times out, I would be none the wiser and just think that's what it's like and all is ok. But I knew it just wasn't right.
So thought process was...fuel or spark problem.
Replaced plugs, filter and fresh fuel after draining tank. Seemed to be ok but water was choppy and flat out speed tests weren't really possible.
Last time out it was just the same. 90kph and noticbly more sluggish out the hole.
So tonight (at 10pm) I did what I had been avoiding since buying it....a compression test.
Now, I did this dead cold, because it was late and didn't want to annoy the neighbours.
Rear cylinder was 120psi and forward 95psi.
Fearing the worst here, but I will go to sleep hoping that it's just because the engine is cold and lacking a bit of oil in the bores.....but in reality I know it's probably buggered.
It's likely I have a winter project on my hands and a top end rebuild.
Easy enough we thinking ? I hear that I can send away the liners and get the pistons sized and sent back. Would they hone the liners too ? Don't have any experience with these wee engines.
Any guides with pictures would be great !
Cheers.