minibuck

i think my derbi senda 50 r has got blow by in the piston what are the symptoms of blowby in 5th gear is wont accelerate at all and struggles with hills in anything above second gear and takes a long time to get into the powerband

the part were after market but not cheap nokeoffs they were supposedly proformace orientated do you mean the bearings in the top of the crank arm as yes i did i was only using what revs i need to get moving and even that was a stugeld as it would only get beryl to a high enouth revs to get moving

i finally got the engine back together but it do not sound right and it not revving properly as when you get into anywhere near the power band it sound like it going to blow up it has compression, oil and flue

so with some day light and some more in dept in investigation the piston has actually collided with the barrel so i have got a new set of ring and a new piston but do i need to replace the barrel there is a small mark on the side of the barrel nothing mayor tho and you can berry feel it so should i replace the barrel or not bother

i tuck the head of the engine and everything locked good the ring were still in place plenty of oil and no ovase cracks any were so i'm not shore whats wrong pre mix my oil isnt relay an option for me because of the amount i use it every day i cover about 50 miles day so pre mix is relay feasible

yea my bikes 2 stroke i don't pre mix my oil my bike has oil injection and yes for about a weak or so it struggled to continue to accelerate in 5 gear i thought maybe it was still warming up so didn't think anything about it but then my engine died so i'm gesing it the ring but haven't got round to taking the head of the engine yet and yes i let it run for about 5 minutes befor i road it to let it warm up

i have DERBI senda 50 r 2000 i was riding with my friend and all of sudden my back wheel locks up i grab the clutch and free wheel to a stop i try to start it again but the kick starter was sold and would not move i got it into neutral and got the bike off the road i tried again to kick start it and it moved but there was no compression can i pls have some advice on what to do thanks