Now I no why my bike cut out ??

[luke#1]

well about a week ago i post about my bike just dieing on me and didnt no why. well I found out wat was up with my bike i had burned a hole in my piston :rambo:.Does any one no how i may have done is to my piston? so it doesnt happen again

cheers

[Youngun']

Wrong spark plug
Wrong jetting
Ignition advanced too much

[ExtremeAcres]

One possibility could be if you had an exhaust leak where the headpipe meets up with the cylinder. Sorry to hear of your woes.... hope you get it fixed and back up and running soon.

[Law]

holding at a certain amount of revs for a certain amount of time can decrease the life of a piston and cause weak spots.
basically what happens is that the flow in the engine doesnt change if the revs dont change, so therefore you get 'hot spots'.

[Ethro]

mine did the same, at 12,500 :) nakkered my head to shreds too, check ur head if ur using it again.... and as law says, its to do with heatspots at a cartain amount of revs it will produce heat in exactly the same place on the piston, which unluck for us is the weak spot on the piston

Edit: i put lewy instead of Law, its been a long day!

[marine42]

luke is my mate, his bike just gradually started to die.

He had standard jetting, but he had added a race pipe and drilled the air box, so is jetting most likely to be the problem?

[williamr]

Probably too weak.

Always do a plug chop after any mods. If in doubt, run a little bit rich rather than lean to protect the piston crown.

Rob

[Davido]

On the note of drilling, what does it actually do to a stock bike and how do you do it? Also, are there any effects, like shorter lifespan on parts etc? Thanks

[joemarsh2004]

you can get a POD air filter off ebay for £9.50 delieverd, works a charm.

[williamr]

you can get a POD air filter off ebay for £9.50 delieverd, works a charm.
But after any change to inlet or exhaust, do a plug chop to check the jetting. Don't belive anything it says on the box.

Rob

[Davido]

Still need my question answered. :crybaby:

[Rasmus RS50]

well if u do it so ur still goes troug the airfilter, it wont harm ur bike any more the putting on a pod filter !!

[Davido]

What does it actually do though?

[Rasmus RS50]

improves airflow in to the engine, and in theory more power, but i doubt it alone will make any difference.

[joemarsh2004]

it made my bike smoother and abit more powerfull all round , not major but enough to notice

[Woodinator]

it made my bike smoother and abit more powerfull all round , not major but enough to notice
Is that with or without re-jetting?

[joemarsh2004]

without, but bidding for a 84 jet atm will make it alot better

[Woodinator]

i mite get one then, i rele cba to re-jet so if its ok witout doing it methinks ill get one once ive got a few quid

[joemarsh2004]

yer i just searched moped i think on ebay and it cam up for 9.50 buy it now with free delievery, it was like 32/35mm or somthing i think

[joemarsh2004]

http://cgi.ebay.co.uk/Performance-Red-Air-filter-DAX-scooters-moped-monkey_W0QQitemZ8006103386QQcategoryZ25640QQssPage NameZWDVWQQrdZ1QQcmdZViewItem

i bought mine from that guy bu mines chrome and he didnt charge me postage

[Woodinator]

ok cheers :)

[joemarsh2004]

no prob, he delieverd in 2 days aswell

[fast_tzr]

by the way whats the website you got your clutch and end can from? 50cctuning says its being updated or sumfin.

[joemarsh2004]

yer it is bu i emailed the guy and he sent me a price list, add me to msn if you have it and ill send you the document

[joemarsh2004]

here you are email him on what you want he get most stuff
dartay@btinternet.com

[fast_tzr]

alrite cheers, i was only looking out of interest really, but thanks anyway.

[joemarsh2004]

there ya go