crasherinc Posted December 20, 2007 Report Share Posted December 20, 2007 Hi everyone, help would be greatly appreciated! Have recently bought a 2005 4T Sherco in exceptional condition and can only say I'm very pleased with the performance and power etc. Lovely smooth bottom end, pulls like a tractor, very tractable with plenty of top end - everything the 290 isn't! This one is actually fun to ride and I had the most fun I've had on a bike for quite a while, so all in all I am very, very pleased. However, (there's always something!), the only down side was that I had problems starting it on a number of occasions which I'll explain here in the hope someone can help me:- 1. If I'd stopped it, (using kill button as advised), or stalled it and it was pointing downhill to any degree it just would not fire up at all. Turn it round and point it up hill and it would fire up second or third kick. Now I can see the answer to this would be obvious but.......................... 2. A section I tried on a number of occasions calls for a shortish blast up a bank, tight turn between trees and a short drop back down on full lock. Bike stalled a number of times when going down the bank and refused to start having done so. Now I realise some of this may be down to my riding technique and not being used to the four stroke differences but it doesn't seem to like being pointed downhill! Any clues as to what might be causing this? Has anyone had any such experiences and how did you resolve the problem? I did wonder about float height or whether float was possibly sticking but uphill ain't a problem and other than this the bike ran perfectly all the time. Any clues or suggestions would be greatfully received. Other than this 'minor' problem I think the bike is awesome! Though it's a 2005 model it has been greatly update and includes 2008 cylinder head, cam, de-compressor, pwk28 carb and 2008 ignition system. No hot start device fitted though I do have it available. Quote Link to comment Share on other sites More sharing options...
ishy Posted December 20, 2007 Report Share Posted December 20, 2007 Check for fuel in the airbox, it sounds like it is flooding, I had the same problem if I had a big get off or the bike was stood on the back wheel. I put a small drain in mine made out of an old tube valve stem, so if it gets flooded with fuel or water you can take the valve cap off and drain. If fuel is the problem you may need to adjust your float hight. Quote Link to comment Share on other sites More sharing options...
crasherinc Posted December 20, 2007 Author Report Share Posted December 20, 2007 Thanks for the reply Ishy. Been out on the bike today and had much less trouble starting it all round due to using the kick start technique I found on the video on Sherco USA, gentle prod rather than a big hoof seems to work better. Still had one or two probs though so I'd appreciate it if you could let me know what the correct float level/height is and how best to measure it. Best Regards Quote Link to comment Share on other sites More sharing options...
robin m. s/c Posted December 28, 2007 Report Share Posted December 28, 2007 Roger. I've just mastered the starting also. When new it was a pig but now nearly run in it's a lot better. I've also lowered float height. Not sure how you should measure height on PWK but it's definateley lower than i ran on the 290. Quote Link to comment Share on other sites More sharing options...
gasgas4life Posted December 28, 2007 Report Share Posted December 28, 2007 lol didn't know sherco did a 4T in 2005?? Quote Link to comment Share on other sites More sharing options...
baldilocks Posted December 28, 2007 Report Share Posted December 28, 2007 wahey now we can all lol at you because they did were you born in 2006 perhaps HA HA Quote Link to comment Share on other sites More sharing options...
copemech Posted December 29, 2007 Report Share Posted December 29, 2007 wahey now we can all lol at you because they didwere you born in 2006 perhaps HA HA Gasser guys on the Sherco thread again! Quote Link to comment Share on other sites More sharing options...
mark1161 Posted January 24, 2008 Report Share Posted January 24, 2008 Here is my take on the 2005 Sherco 320 4T and it's starting problems - some of the mods were done by it's previous owner and some by me so I can't claim credit for all of this work - I've only owned the bike for a month and I'm still getting to grips with it and after a bit of fettling and adjustment I find it is easy to ride, it finds grip in the least likely of situations and makes me look way better at trialling than I actually am.......... Here's a list of what has been done Cam mods with new de-compressor mechanism Re-inforced 2008 inlet manifold Keihin PWK28 carb with :- 45 pilot jet 120 main jet GFH needle on centre notch (part number to follow next time I have the carb off.....) 3.5 cutaway slide Hot start mechanism fitted (although I never need to use it) - one point here - make sure that the vent hose from the inlet manifold doesn't get kinked when you put the fuel tank back on as this'll stop the hot start system working) Float height set to 16.7 mm (it was 15.2 mm before and I had stalling problems before I changed this) - measured from the gasket face to the corner of float where the vertical edge meets the bottom Quote Link to comment Share on other sites More sharing options...
shercoman2k8 Posted February 22, 2008 Report Share Posted February 22, 2008 i have the same problem with my 06 sherco 125cc. 2t. i can ride it around fine but as soon as the down hill appears it fluffs and dies unless i keep the engine revving manualy instead of on tickover Quote Link to comment Share on other sites More sharing options...
copemech Posted February 23, 2008 Report Share Posted February 23, 2008 i have the same problem with my 06 sherco 125cc. 2t. i can ride it around fine but as soon as the down hill appears it fluffs and dies unless i keep the engine revving manualy instead of on tickover As this is really a different animal(presume you are running the dellorto) sounds as though you need to clean the carby and verify the float height as well. I recommend you start a new thread on this if you continue to have problems. Quote Link to comment Share on other sites More sharing options...
shercoman2k8 Posted March 5, 2008 Report Share Posted March 5, 2008 sorry problem sorted!!! i had just bought it from gary at highland leisuresport immacualte it was because the fuel switch was not fully turned to on Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.