betarich Posted November 30, 2014 Report Share Posted November 30, 2014 Hi ive been out on my mont today and noticed its started to hunt on tick over, it starts first or second kick every time and seams to have bags of power and runs great, but 2 people have said to me today that the ignition timing is out when they were sat at the side of my bike when on tick over. can the timing be adjusted on a 315? if so how do i set it? Thanks in advance Rich Quote Link to comment Share on other sites More sharing options...
tail Posted November 30, 2014 Report Share Posted November 30, 2014 Hey Rich, that's nothing to do with timing, i reckon your pilot jet is blocked Quote Link to comment Share on other sites More sharing options...
topcat Posted November 30, 2014 Report Share Posted November 30, 2014 Hey Rich, that's nothing to do with timing, i reckon your pilot jet is blocked I would say the same thing, highly unlikely the timing has altered Quote Link to comment Share on other sites More sharing options...
stannergas Posted November 30, 2014 Report Share Posted November 30, 2014 def a fuel issue. Worked on car and bike engines most days for the last 35 years (old git) - if your timing was out, which is very, very unlikely on any Honda engine unless someone has been tinkering where they shouldn't, then you would have starting and power issues. It's surging because it's fighting for the right mixture - as a previous post suggested you probably need a good carb and filter cleaning session and while you're at it make sure theres no splits/perrished bits between carb and intake and that the joint and clip are in good nick. when it's back together make sure the idle screw is where it should be. depends what size pilot jet you're running but mine runs like a swiss watch set at 2 turns out give or take. Good luck Quote Link to comment Share on other sites More sharing options...
clay Posted November 30, 2014 Report Share Posted November 30, 2014 As above, timings fixed on a 315. Quote Link to comment Share on other sites More sharing options...
magicmat Posted December 1, 2014 Report Share Posted December 1, 2014 going to buy myselft a little sonic cleaner from ebay to do exactly this job. borrowed one to do the carbs on my road bike. Handy bit of kit Quote Link to comment Share on other sites More sharing options...
betarich Posted December 1, 2014 Author Report Share Posted December 1, 2014 while on with the carb subject ive heard of some people changing the carb for a Keihin carb, is this correct? if so does anyone know what the carb model number is and if it is worth doing? Quote Link to comment Share on other sites More sharing options...
tail Posted December 1, 2014 Report Share Posted December 1, 2014 Hey Rich, i've had two 315's and on the first i fitted a Keihin pwk28 which really opens up the power and helps starting especially when you drop the bike but on my last one i fitted the pwk 26 instead, made the power a lot smoother You can also get the copy carb OKO or a few other copy makes, still as good The PWK is standard on the Beta Evo's and also Ktm85sx or most small 2 stroke crossers I'd seriously recommend changing to one In fact i have one knocking around or spec to Rich Allen at Allens used trials spares and he'll sell you a brand new copy pwk for £85 ish Quote Link to comment Share on other sites More sharing options...
betarich Posted December 1, 2014 Author Report Share Posted December 1, 2014 Hey Rich, i've had two 315's and on the first i fitted a Keihin pwk28 which really opens up the power and helps starting especially when you drop the bike but on my last one i fitted the pwk 26 instead, made the power a lot smoother You can also get the copy carb OKO or a few other copy makes, still as good The PWK is standard on the Beta Evo's and also Ktm85sx or most small 2 stroke crossers I'd seriously recommend changing to one In fact i have one knocking around or spec to Rich Allen at Allens used trials spares and he'll sell you a brand new copy pwk for £85 ish just sent you a PM mate Quote Link to comment Share on other sites More sharing options...
magicmat Posted December 2, 2014 Report Share Posted December 2, 2014 HI Rich, I think you were at the barnsley trial on sunday? I watched you ride because im restoring a 315 at the minute, you could also import your own OKO carb, by buying it off ebay, 26mm = £59 http://www.ebay.co.uk/itm/OKO-26MM-POWERJET-FLAT-SIDE-CARB-Keihin-PWK-carb-TYPE-/221571348481?pt=UK_Motorcycle_Parts&hash=item3396ae7801 28mm = £61 http://www.ebay.co.uk/itm/OKO-28mm-RACING-CARB-FLAT-SLIDE-CARBURETTOR-/281461273404?pt=UK_Motorcycle_Parts&hash=item418866333c Quote Link to comment Share on other sites More sharing options...
magicmat Posted December 2, 2014 Report Share Posted December 2, 2014 what jets would be good to use for these carbs? Quote Link to comment Share on other sites More sharing options...
betarich Posted December 2, 2014 Author Report Share Posted December 2, 2014 Are they a direct bolt on item or will I need to do some modification to the bike or carb? Quote Link to comment Share on other sites More sharing options...
chuck4788 Posted December 15, 2014 Report Share Posted December 15, 2014 Modifications are needed, biggest issue is the air boot is too small for the PWK. You can use Beta jetting for a starting point. Couple of threads in this Forum. Quote Link to comment Share on other sites More sharing options...
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