Hey guys, my gilera runner sp 50 (07) has broken again, i was driving other day and it jst stopped at lights and has'nt started since. It is standard other than derestricted and was running fine all the way (20miles or so) before it stopped. Previously the exhaust was very loud but thats because of the baffle im pretty sure. I have never let my oil run low or run out and it was recently topped up with some ttsport 2stroke oil. It has coolant in the system and is not registering as getting over warm on my temperature gauge. Due to suspicions that it was water in fuel tank, I have already drained fuel tank and removed carb, drained it and replaced it all correctly and then re fuel'd with no improvement. Any more ideas? pleasee x Thnks in advance, jet
mate i think its because you are not getting any sparks in the engine check your spark plug for sparks simply just take the plug out and connect to the cap and place the plug on the frame and kick start it and see if its starts to spark..
then its either your not getting petrol through or have a look at your core its a 07plate but things can still go wrong...
petrol is going to the carb at present, or at least it appears so, hmm i have checked over the bike and cannot see any reson for there to be a problem useless me though
no thats a shit idea.. actualy, its not coz this guy sounds like he dnt know too much about bike. if the bike has spark, compression and its getting fuel it has no choice but to start, u sure it aint seized?
Change the plug even if it's sparking on the earth don't mean it's sparking in a pressurised environment 3 quid could be a cheap fix
will run and grab one tomorrow from shop up the road, its worth a shot. The plug is fairly old but seems to be providing a spark when i test it, we shal see tomorrow I hope so
ok,i have had another look at bike, theres no fuel gtting to the carb, i'm sure there was yesterday but most likely not... hmm fuel pump?
fuel pump could well be the prob, or fuel tap... take both pipes off the bike and suck the smaller one, fuel should come out of the bigger one. this shows the fuel tap is working.. if nothing comes out check the aux fuel tank is actually filling up.
fuel is coming through the pump, but its not pushing any fuel, if i lower the pipe fuel is coming through, however when its connected to carb its not pushing fuel up to it. as far as i understand the pump should be pushing fuel as i kick yes?
any fuel pump i know of is electric, if it is then bridge it to battery and see if it works then, if not then replace it.
gotta remember to log her out now.... reply was obviously me. fuel pump's work on positive and negative alternating pulses (so crankcase compression/vacumm) the pump pipe go's below the reedblock.. remove, suck and blow down it alternativly as quick as possible for 30 seconds.. then suck the vacumm pipe to open the tap and fill the carb.. you de restricted it? it went loud? now wont run? its deffo a carb yes? if so did you upjet? HOW was it derestricted? sounds to me like somone doesent have a clue, fucked with there bike and blew it up
nah mate restriction was a long time ago and i had it all set up and jetted at a garage, the exhaust has been noisy for a while but not because of restriction. will try ur advice with pump
ok i tried all tht and i cnt generate a vaccum to keep fuel flowing, also when there is fuel availible to the carb it still not starting.
its a new bike.. it should be under warrenty... or take it back to the place that worked on it for you? lesson, dont play wiht things you dont get
the thing is i have a good idea how things work, i jst am not good at resolving issues with it. im lost, and i dont have enough income to afford getting it looked at so i guess itll be on the drive for a while now. cheers for ur help anyway minor nd the rest
the whole point of home mantenance is to keep your bike up to scratch with little money spent... with this in mind leave your bike alone and fix it when it needs it and it should be fine so, your skitn and it dont run. the manual covers all the silly things that can be wrong, these being delivery compression spark exhaust so check the carb is supplying the engine with fuel and therees no air leeks (has fuel in the carb and everyhting is in place/no rips/broken/fucked looking manifolds/pipes) if not its a simple fix, somthing wiht the fuel tap/pump. if theres fuel then pull the reeds out, if there intact and sealing you have to check theres no blocked jet or somthing stupid...is it getting too much fuel? (fuel tap AND float fucked pushing all the fuel into the engine) its not hard to track down delivery as its ether in the carb or its not... if its in the carb an the reeds are fine then its probably fuck all to do with fuel. compression is both in the case or in the cylinder, for n ow we will forget this as its a l,ast resort check on a 2t. you work from the outside in when you diagnose an engine and start at the middle when you build one. saves time spark is easy.. check for a nice big blue spark form the plug.. if not then fix whats broken.. aghain, simple to chase the problem... if it is sparking all nice and blue with a NEW plug and still not running then it could well be timing but its hard for a cdi to fail and throw the spark at the point of not running atall... other than a loose pickup it cant really be anything WITH a spark, without is obviously the cdi/stator/flywheell or just poor wiring somwhere exhaust... does it smell when you kick the bike over? smelling fuel is another way of checking delivery/flooding. is the gasget intact? does it sound like its leaking? if all this is fine then chances are its ACTUALLY somthing wrong wih the engine (3 whole moving parts, shouldent be hard should it?) probably rings/piston/cylinder damage of some kind, or oil seals.... anything other than minor damage/easily replacable parts will tell you there fucked (as in make lots of noise) thats about it... cant be much wrong wiht it as theres not much to it.. so chace the problem by iliminating it... dont think what it could be, make sure you know what it ISNT. only then will you spot the things you cant think could go wrong will have it sorted or atleast an idea by morning..
right ... last night took another look and ran through what it could be. there is no fuel being pushed to the carburettor when i kick the engine, so i believe it is the fuel pump that's the issue, the tap should be ok because if i blow into the vaccum pipe it will push fuel to the carb breifly. If anyone thinks im stupid for this diagnosis please let me know