Broke down this morning!

I've had a bit of an eventful morning, I was riding to work as normal, and my Runner
broke down.

I've whipped the engine out, and took off the head, and I've holed my piston. Luckily the barrel still looks in very good condition, so it should only take a new piston, rings and a gasket set. And I'll be on the road again.

 

Eeeek what caused the hole?

 

cheers minor i thought it was caused by lean running, but didnt think about partial throttle.

i was going to fit a bigger main, but i was thinking fuck me if its running that lean, what the hells it gonna go like with the proper jet in :w00t:

Heres a very interesting article ive got on my computer from somewhere, i may as well share

http://www.smellofdeath.com/lloydy/pist ... _guide.htm

 

I was talking about your bike this morning to some other people about how nice it is.....i think i put the devils eyes on it

loool but seroiusly i was talkin about it to my cousin about it.

ow welll


hope its back on road soon again and touch wood nothing goes wrong

 

im running an 88 main jet (pre-mix)

cant remember the needle position...been a while..

And theres no carbon anywhere on the crown or head, in the pictures is how it was when i pulled the head off after 9 months running :w00t:

 

yeahh could of been worse m8....the barrel looks in very good shape considering, no sign of scoring

must of been the 33:1 pre-mix, which could of also contributed to the lean running..

you have to put a bigger main in for pre-mix...cause oil aint fuel if you get me

 

detonation
bang straight through the centre of the piston
im suprised it wasnt destroying plugs before this

what ignition do you have in it

more fuel wil stop the deto as well as like minior said
but its time for a decent inner rotor as well

 

stock ignition...but i changed my Laser for a yasuni c16 nearly 2 weeks ago.

I had nearly 9 months trouble free running with that kit and the laser, im assuming its running leaner now ive fitted the yasuni ???

 

yeah it may be running leaner but its also may be running hotter if the yasuni is scavengine better up top which we know it is for sure

you will be going to new heights in rom and the ignition curve of the stock ignition is not designed to do that and will be holding to much advance
Fattening it up will fix the issue

however if you decide to get a decent ignition retarding it up top will add to over rev and power

 

unlucky mate! only saw you fly past yesterday haha

glad its a simple fix though!

 

yeah you could do that with the pickup that would work fine

Im using a non charging system
I was going to hook up my 10 watt system but couldnt be botherd
I have a solar panel under the seat when i stop i just pull that out and sit it on top of the seat and it charges the battery
Of course on the gold coast we have lots of sun
im not sure how it would work in england

 

fair enough
i dont have the lights on my scoot
i just have a switch to turn them off and on
but if i want to ride at night
I just ride my car
hahaha

it warm enough here that i ride in board shorts and a tee shirt all the time

 

heres a pic of the piston and barrel, i was quite pleased with the overall condition, no scores at all....well apart from a big hole that is imp:

 

Who would of thought an exhaust change could cause all this aggro arc: