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Post by trancer on Jul 5, 2013 11:42:07 GMT
Hi everyone, iv got a small problem and was wondering if anyone else has ever had the same, basically, the bike starts and runs fine and pulls effortlessly on the road for the first 10-15 minutes then all of a sudden it seems to hold back, it feel a lot like binding brakes but iv pulled over every time to check and the bike moves freely, the callipers and discs are cold, its driving me nuts because i just want to enjoy the road for once Any help would be great thanks  |
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Post by m40man on Jul 5, 2013 11:47:54 GMT
Hmmm, my first thought would be that the choke is sticking a bit? I'd check that before faffing with the carbs, anyway.
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Post by trancer on Jul 5, 2013 11:52:51 GMT
Iv already had the carbs off, stripped and cleaned everything, put them back and used a morgan carbtune to sync them, iv also made sure the choke isn't sticking, yesterday i even took the tank off and drained it to make sure there was no water sitting t the bottom, its a strange problem this one, if i leave the bike overnight to cool and start from cold it will run well for 10-15 minutes again
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Post by m40man on Jul 5, 2013 11:57:46 GMT
Iv already had the carbs off, stripped and cleaned everything, put them back and used a morgan carbtune to sync them, iv also made sure the choke isn't sticking, yesterday i even took the tank off and drained it to make sure there was no water sitting t the bottom, its a strange problem this one, if i leave the bike overnight to cool and start from cold it will run well for 10-15 minutes again Yes, I saw from your previous posts you'd swapped carbs in the past & had a Carbtune to hand. It's the fact that it runs good until nice & hot makes me think choke. If you're happy the choke slider is returning properly when the choke is taken off, I'm a bit stumped  . When it starts to play up, if you park-up does it rev cleanly in neutral? |
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Post by trancer on Jul 5, 2013 12:22:59 GMT
Yeah i made sure the choke sliders were moving freely, to be honest i dont use the choke at all because the bike just wont start with it on even just a small amount, its starts up perfect without it, when i pull over its revs lovely with no problems, iv also checked the chain and tyre pressures, its been like this for months now
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Post by HRHpenfold on Jul 5, 2013 12:34:22 GMT
coil failing once getting hot, or valve clearances to tight,fuel filter blocked,
could be anything really!
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Post by trancer on Jul 5, 2013 12:42:21 GMT
coil failing once getting hot, or valve clearances to tight,fuel filter blocked, could be anything really! i have got a spare coil which i did swap over when i had a rear calliper problem, il swap that back later and see what happens, i did my valve clearances a couple of weeks ago, maybe i should check them again to make sure, i have a new after market fuel filter on the bike but im wondering if its restrictive |
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Post by trancer on Jul 5, 2013 12:46:47 GMT
One thing i forgot to mention is that if i open the throttle wide when the problem appearers the bike seems to open up again
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Post by m40man on Jul 5, 2013 12:54:14 GMT
.... a new after market fuel filter on the bike but im wondering if its restrictive A cheap prospect to check. |
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Post by trancer on Jul 5, 2013 13:00:12 GMT
A cheap prospect to check. I suppose i could run it for a sort distance without a filter just see, il order a new one anyway but it would be nice to get to the route of the problem |
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Post by ContourMac on Jul 5, 2013 13:10:51 GMT
Check the petrol tank breather. If it is clogged you build up a vacuum in the tank restricting the flow of fuel to the carbs.
Seem to remember Doom had a similar problem with his 1300
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Post by HRHpenfold on Jul 5, 2013 13:31:00 GMT
Check the petrol tank breather. If it is clogged you build up a vacuum in the tank restricting the flow of fuel to the carbs. Seem to remember Doom had a similar problem with his 1300 good point, when it won't work right, stop and open the tank, that should tell you if the tank breather is blocked! |
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Post by trancer on Jul 5, 2013 13:36:05 GMT
Check the petrol tank breather. If it is clogged you build up a vacuum in the tank restricting the flow of fuel to the carbs. Seem to remember Doom had a similar problem with his 1300 That's a good point, i think il give that a go before anything else, thanks for the tip |
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Post by trancer on Jul 5, 2013 13:36:32 GMT
Thanks for your help everyone, il let you know how i get on
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Post by teejayexc on Jul 5, 2013 15:32:14 GMT
Breathers eh, that old chestnut  |
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Post by trancer on Jul 5, 2013 21:02:35 GMT
I took a look at the breathers and all seems fine, i blasted it with the air line anyway and its clear, Oh well back to the drawing board, took the bike for a run tonight and the same thing happened again!
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Post by trancer on Jul 7, 2013 20:18:30 GMT
Well i spent the whole day Saturday stripping down the carbs again, changing plugs, coil, leads, checked the fuel lines and breathers, today(sunday) i went on a 160 mile trip with the lads and the bike was an absolute nightmare!! still got the same problem, it's also started to splutter under low revs and only picks up again if the throttle is wide open, it almost feels as if the engine is retarding at low revs??
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Post by pilgrim on Jul 7, 2013 20:42:16 GMT
How about those carb inlet rubbers? I know from recent experience they don't change if already knackered no matter how many times you take the carbs on and off. Just a point to eliminate if nothing else.  |
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Post by neilmud Lord Protector on Jul 8, 2013 0:57:17 GMT
water in the tank
neil
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Post by Deleted on Jul 8, 2013 8:06:23 GMT
I know you said you'd a carbtune but it sounds a bit like overfuelling. Something would seem wrong if the choke isn't needed and strangles the bike when on from cold.
I'd start the setup again or turn in the mixture screws a 1/4 turn in from where it is now and see if you still get the problem or if it improves, if it improves then another trial and error or listen until you get to the best mixture.
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Post by Deleted on Jul 8, 2013 8:13:39 GMT
Valve clearances?
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Post by neilmud Lord Protector on Jul 8, 2013 8:19:51 GMT
It seems like we are all going with our favourite faults CD will be along soon & advise changing headstock bearings & powder coating everything Neil |
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Post by ContourMac on Jul 8, 2013 8:23:55 GMT
It seems like we are all going with our favourite faults CD will be along soon & advise changing headstock bearings & powder coating everything Neil And seeing a Chiropractor  |
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Post by Deleted on Jul 8, 2013 10:38:23 GMT
Ah, but with the exception of headstock bearings and stove enamelling it could be any of the others.
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Post by showaddydadito on Jul 9, 2013 7:22:33 GMT
It seems like we are all going with our favourite faults CD will be along soon & advise changing headstock bearings & powder coating everything Neil OK - I'll bite. Trancer - Put your location in your profile and you might find someone lives near enough to you to offer a looking at and see if they spot anything. |
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Post by trancer on Jul 9, 2013 11:45:00 GMT
Well i live in west wales, there isnt even a bike shop or mechanic around these parts, all thats here is retired wealthy people who drive massive range rovers and Tvr's, if you own a bike here you have to fix it yourself
i went out for a test run again last night after checking over all the fuel lines, plugs, air housing, tyre pressure, i even tested the TPS on a ohm meter, everything seems perfect, like clockwork the bike work faultlessly for the first 5 miles or so then started really holding back bad, i had to change down the 4th on the straight and then even 3rd, had to pull over at this point
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Post by Deleted on Jul 9, 2013 13:37:58 GMT
Sounds like a coil is breaking down
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Post by trancer on Jul 9, 2013 14:08:05 GMT
Sounds like a coil is breaking down Iv already changed the coils and plugs, still got the same problem  |
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Post by neilmud Lord Protector on Jul 9, 2013 14:26:03 GMT
Plug caps & HT leads.
Fuel pump.
Neil
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Post by trancer on Jul 9, 2013 14:58:11 GMT
Plug caps & HT leads. Fuel pump. Neil done the rest but not the fuel pump, its the electic type and seems fine, im not getting a lean mixture, when looking at the plugs after bike has cooled down, every one of them seem to be burning well with the normal tanned colour |
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