John roach Posted November 3, 2019 Report Share Posted November 3, 2019 (edited) Got a montesa 4rt 2014 it's a nightmare to start especially when in use do valve clearance need doing or piston rings to also where can I get a manual for it any help be grateful have to bump it to start my 50 year old lungs can't handle it much more .2 stroke coming I think lol spark is not great too put 3 plugs in it now Edited November 5, 2019 by John roach Quote Link to comment Share on other sites More sharing options...
300strokes Posted November 3, 2019 Report Share Posted November 3, 2019 John, Maybe you already know the startup procedure or maybe not. The 4rts need NO throttle to start, and also must have a tickover of approx 1800rpm. If this has been lowered the bike will be a pain to start. Holding the throttle wide open and kicking twice resets the ECU and may also help with your issue. Hope this helps 2 Quote Link to comment Share on other sites More sharing options...
jimmyl Posted November 3, 2019 Report Share Posted November 3, 2019 Always stop it with the kill button/ lamyard. don’t stall it to stop it ? Quote Link to comment Share on other sites More sharing options...
John roach Posted November 3, 2019 Author Report Share Posted November 3, 2019 Don't make any difference still won't start m8 Quote Link to comment Share on other sites More sharing options...
300strokes Posted November 3, 2019 Report Share Posted November 3, 2019 Trying the easy things first, perhaps unplug the ECU and use a quality water displacing spray on the contacts. Very easy to get them damp and cause issues. Otherwise try a compression test. Quote Link to comment Share on other sites More sharing options...
on it Posted November 3, 2019 Report Share Posted November 3, 2019 Hi gone through all this with mine------ check leads on coil clean also check earth leads they do black with contamination. i have also found spark plugs are varnishing up with fuel & they do like new plugs you can always screw air screw out to give more air if that works could be time to remove ecu and give it a clean over oiling the air filter will not help with starting you dont say if bad to start all time or just when hot if hot would say check valves hope this might help Quote Link to comment Share on other sites More sharing options...
John roach Posted November 3, 2019 Author Report Share Posted November 3, 2019 Starts ok when first started when out on it I stop in on switch or stall it I can't start it got to bump it toke plug out earlier couldn't smell petrol on it so wasn't flooded m8 Quote Link to comment Share on other sites More sharing options...
huski Posted November 3, 2019 Report Share Posted November 3, 2019 I'd check the valve clearances if it starts ok cold,but not when hot 1 Quote Link to comment Share on other sites More sharing options...
John roach Posted November 3, 2019 Author Report Share Posted November 3, 2019 Yeh that's my first protocol m8 Quote Link to comment Share on other sites More sharing options...
jimmyl Posted November 3, 2019 Report Share Posted November 3, 2019 Throttle cable slack - check not opening butterfly by being too tight. is your tick over correct - you said yes to a load of things earlier so not sure 1 Quote Link to comment Share on other sites More sharing options...
John roach Posted November 3, 2019 Author Report Share Posted November 3, 2019 Well it ticks over ok m8 not to low cable has play in it just don't start when hot. The plug wasn't wet when I took it out so is there a fuel filter on them might be blocked Quote Link to comment Share on other sites More sharing options...
jonnyc21 Posted November 4, 2019 Report Share Posted November 4, 2019 (edited) As stated above, the 2 things that seem to cause the most issues with a 4RT in the way you are talking are low tick over (not 1800 RPM) and valves being out of spec on the tight side. I would of course check the tick over (idle RPM) is 1800 first, then if that's good then move to valves and let us know if your still seeing the issue. Edited November 4, 2019 by jonnyc21 1 Quote Link to comment Share on other sites More sharing options...
Bilko Posted November 4, 2019 Report Share Posted November 4, 2019 2015 so should be ok http://montesatrials.com.au/store/wp-content/uploads/2014/11/2015-Owners-Manual-Cota-4RT.pdf 1 Quote Link to comment Share on other sites More sharing options...
John roach Posted November 28, 2019 Author Report Share Posted November 28, 2019 After 3 weeks back in bike shop turns out the fuel pump was knackered it was intermittent problem Quote Link to comment Share on other sites More sharing options...
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