Yamaha Dirt Bikes Forum

took my bike out the other day it just died out and wouldnt kick up so changed piston and ring because there wasnt much compression but it still wont start has anyone any ideas please all electrics are fine  

new plug? how olds the gas? carb need a cleaning? there are an infinite amount of things that can be wrong that just require litlte fixes. i'd try changing the plug though . ~pat  
PEACE GUYS ITS BEEN A BLAST!!!!! ~patrick

got new plug new gas carb clean  

If the plugs good, gas is fresh and carbs clean its either jetting or electrical. Was the bike running good before it died? Is the plug wet after trying to start it?  
____________________________________________________________



The Idle of a 500 2 stroke is Akin to the Devils Heartbeat


I'm not afraid of the dark, I own the NITEMARE that lurks within.

bike woz runnin ok but woulndnt hit band in 3rd then just died  

I'm gonna let skip and woods chime in. What did the old plug look like? Was it black, brown, what color? Did you clean the carb? If so are the floats set?  
____________________________________________________________



The Idle of a 500 2 stroke is Akin to the Devils Heartbeat


I'm not afraid of the dark, I own the NITEMARE that lurks within.

the spark plug was dark brown cleaned me carb floats ok could it have anyfin to with me changing me 2 stroke oil because changed me oil and thats when all the problems started  

It shouldn't. An engine needs very few things to start and run. Compression(you said you have), spark(you say the electricals ok, but how do you know?), fuel/air mix(jetting), nd it has to be timed right. Is it even trying to start? Are you getting a spark at the plug when grounded out so you can see?  
____________________________________________________________



The Idle of a 500 2 stroke is Akin to the Devils Heartbeat


I'm not afraid of the dark, I own the NITEMARE that lurks within.

it gives off a good spark its tryin to start but bk fires then nufin 4 a few mins then bk fires agen  

Can the bike be push/pull started? Was the cylinder in good condition?  
====================

Nobody's gonna hurt anybody. We're gonna be like little Fonzies here. And what's Fonzie like? Come on what's Fonzie like?

the cylinder was in good condition what you mean by push/pull started  

this is tricky, first time i did it i cracked my nuts and ripped my shorts and boxers halfway to china. but this is how i do it, put the bike in neutral, get running as fast as you can down hill with the bike, jump up on the bike and as soon as you do click the bike into 2nd gear. not teh best for your bike but it forces it to either start or just skid. o and if you bounce up and down sort of on the suspension that ussually helps.

now to your oil question. i believe switching from synthetic to semi synthetic or w/e when htere is still gas mixed in your tank, so the two unlike oils mix can mess up your running. but as far as i know this only makes it fowl plugs. ~pat  
PEACE GUYS ITS BEEN A BLAST!!!!! ~patrick

tried to bump it still no joy  

hmmmmm. well. the only thing left is jetting. whats the jetting at right now? and whats hte manual say ~pat  
PEACE GUYS ITS BEEN A BLAST!!!!! ~patrick

That trying to start and back fire is common with a bad or wrong gapped plug. Did you adjust your air/fuel mix? Also could be timing. Have you checked all of that?  
--------------------
Ruff!