Agibson3hr2 Posted June 20, 2013 Posted June 20, 2013 (edited) I seem to be having a lot of issues with my bike such as misfiring when I'm throttling the bike and even after being sat for 5 minutes with the choke on the bike still will not idle when the choke is released. http://www.youtube.com/watch?v=hp91D4DgS9k&feature=youtu.be And it will not start when on the side stand either :\ Edited June 20, 2013 by Agibson3hr2
welshwan Posted June 20, 2013 Posted June 20, 2013 Hi there mate, there are actually alot of bikes on the road that will not idle, mine for example! lol Its almost certainly the carb that needs a clean and adjusting, i have tried but can never quite get it right! I will have to soon though as i'm planning on getting rid of it. So yeah carb cleaning/adjusting is my bet
Agibson3hr2 Posted June 20, 2013 Author Posted June 20, 2013 Hi there mate, there are actually alot of bikes on the road that will not idle, mine for example! lol Its almost certainly the carb that needs a clean and adjusting, i have tried but can never quite get it right! I will have to soon though as i'm planning on getting rid of it. So yeah carb cleaning/adjusting is my bet Yeah, I've taken my whole carb to pieces and cleaned it out, but tbh.. nothing seems to be working... when I turn the revs up on my carb it will idle nicely but as soon as I've been riding round town for say 20 minutes and stop... my bike is then idling at like 2000 revs instead of say 1200-1400 I have no idea what to do, it's annoying me and I'm thinking about getting rid of it and getting another bike.
welshwan Posted June 20, 2013 Posted June 20, 2013 I'm thinking about getting rid of it and getting another bike. They are pretty nice bikes, cheap on fuel, pretty light-ish, looks good, nice sitting position and seat but there is always maintenance or bits and pieces that need doing.......i guess every bike has things break from time to time but the problem i think with the XT is that people buy them as reliable commuting bikes and people expect not to have to do much work on them but you do, when it's something you can't do yourself garages take the piss with the prices they charge so people get annoyed and look for something else. But lets be honest as far as bikes go the XT is pretty good reliable bike. You certainly could have picked a much higher maintenance bike thats for sure! but yeah i'm not sure what to suggest mate, best of luck!
Agibson3hr2 Posted June 20, 2013 Author Posted June 20, 2013 They are pretty nice bikes, cheap on fuel, pretty light-ish, looks good, nice sitting position and seat but there is always maintenance or bits and pieces that need doing.......i guess every bike has things break from time to time but the problem i think with the XT is that people buy them as reliable commuting bikes and people expect not to have to do much work on them but you do, when it's something you can't do yourself garages take the piss with the prices they charge so people get annoyed and look for something else. But lets be honest as far as bikes go the XT is pretty good reliable bike. You certainly could have picked a much higher maintenance bike thats for sure! but yeah i'm not sure what to suggest mate, best of luck! Yeah that's true, but I could put up with doing the maintenance myself if I were doing silly speeds to cause the bike to break in the first place, but with my XT I'm literally going to college and back every day and that's it... It's annoying me how a few of my friends thrash the s*%t out of their 2 strokes such as the RS125 etc and nothing has gone wrong with them but I can't get above 65mph and I treat my bike like royalty and it's breaking haha. I dunno, I love the bike but its just frustrating y'know?
welshwan Posted June 20, 2013 Posted June 20, 2013 Actually on further thought! maybe the carb needs to now be set at a different level then the book says to make up for the big bore exhaust. There is a lad on here 'prichard xt' he seems to know a heck of a lot about these bikes, see if you can contact him, he's on my friends list. Don't forget to post a comment when you get to the bottom of it so that others can
welshwan Posted June 20, 2013 Posted June 20, 2013 Yeah that's true, but I could put up with doing the maintenance myself if I were doing silly speeds to cause the bike to break in the first place, but with my XT I'm literally going to college and back every day and that's it... It's annoying me how a few of my friends thrash the s*%t out of their 2 strokes such as the RS125 etc and nothing has gone wrong with them but I can't get above 65mph and I treat my bike like royalty and it's breaking haha. I dunno, I love the bike but its just frustrating y'know? I understand matey! i'm sure theirs does break they just don't say anything
Agibson3hr2 Posted June 20, 2013 Author Posted June 20, 2013 I understand matey! i'm sure theirs does break they just don't say anything Haha hopefully that's the case
Prichard XT Posted June 20, 2013 Posted June 20, 2013 well that dosent sound right have you changed anything else on the bike air box, carb main jet, removed AIS, spark plug or made any adjustment to idle screw, fuel mixture sxrew seems like a mixture problem also is it a full system or just end can hows the fitting between the can downpipe and engine this could be an air leak I use an over sized tail pipe which every 500 mile the connection between the upsizer to down pipe degrades and lets an air leak and back fires like fuck soon to be welded tho
Agibson3hr2 Posted June 23, 2013 Author Posted June 23, 2013 well that dosent sound right have you changed anything else on the bike air box, carb main jet, removed AIS, spark plug or made any adjustment to idle screw, fuel mixture sxrew seems like a mixture problem also is it a full system or just end can hows the fitting between the can downpipe and engine this could be an air leak I use an over sized tail pipe which every 500 mile the connection between the upsizer to down pipe degrades and lets an air leak and back fires like fuck soon to be welded tho well that dosent sound right have you changed anything else on the bike air box, carb main jet, removed AIS, spark plug or made any adjustment to idle screw, fuel mixture sxrew seems like a mixture problem also is it a full system or just end can hows the fitting between the can downpipe and engine this could be an air leak I use an over sized tail pipe which every 500 mile the connection between the upsizer to down pipe degrades and lets an air leak and back fires like fuck soon to be welded tho I haven't changed any of the above and it is a full spring loaded system. I'm not too sure where the idle screw is exactly on my carb and where the mixture screw is... It was to my understanding that the idle screw was on the left hand side.
j0hn Posted June 23, 2013 Posted June 23, 2013 Here is a video of the XT 125 carb that member DJW997 uploaded. He shows where the screws are and how to deal with the issues you are having, great video.
Alexengongong Posted June 25, 2013 Posted June 25, 2013 My idle speed was all over the place! I've sorted all the idle speed/mixture out, you may need to adjust your cam timing, that helped mine loads! And its pretty easy to do just takes a bit of time and a couple of tools.
Prichard XT Posted June 28, 2013 Posted June 28, 2013 you might find you have to adjust or swap a few things and changing cam timing sounds like an idea tell me more
dt502001 Posted June 28, 2013 Posted June 28, 2013 Alex Do you mean adjust the cam chain tension? Not timing? the cam chain if loose will mess with timing but to my knowlage the cam timing is fixed and not adjustabl unless you slot the sprocket mounting holes and index the cam using a degree wheel. Personaly I think you need to check the valve clearence. Then if thats ok then set the carb up set float height to factory spec. fuel mix screw at 1.5-2 turns from fully seated,once you have the bike ideling again you can keep adjusting for off idle performance IE no bog when snaping the throttle open. But only go 1/8of a turn at a time Also not starting on side stand will it start standing upright with side stand down? if not you have a problem with the side stand saftey switch could be cutting out your spark then when it allows spark you firing raw fuel which could back fire in the pipe. And realy mess with the back pressur in the cylinder.And stop your bike from idleing.
Moderator Cynic Posted June 29, 2013 Moderator Posted June 29, 2013 Have you richened the mixture for the pipe? Anything else non stock.
Prichard XT Posted July 1, 2013 Posted July 1, 2013 iv had recent back firing an it was due to the hose from fuel vac to manifold being kinked and perished I this will sound abit of a novice but could you change the value timing by turning crank to TDC take the cam covers off remove tensioner and rotate the cam side chain gear by 1 tooth or however many times either way keeping the chain in the same place (use markings) then fit back together not the most technical but you get the idea I may try it before I change engine
Alexengongong Posted July 2, 2013 Posted July 2, 2013 By cam timing i meant valve clearance... Sorry bad choice of words
Prichard XT Posted July 3, 2013 Posted July 3, 2013 and what did you set it to if you don't mind me asking stock intake valve is 0.08 closed stock exhaust valve is 0.12 closed im going to spend some time tomoro messing and tweeking to get her running better so this would be helpful I assumed you had to change the cam to get the valves to a lift higher or is there limit on the free play
Recommended Posts