ads54 Posted July 27, 2015 Share Posted July 27, 2015 Bit of a strange one this as I've never seen or heard of one fitted before. I recently got a bike with a gsxr11 motor which has been bored to 1260 (allegedly)It's running what look like standard Micky Roonies either 38 or 40, not checked yet, but here's the thing, it running a fuel pump between the tank and twin carb feed! Why would this be the case? Never heard of the need to be honest. Because of the tank shape the fuel tap does sit lower than the carbs slightly but it's large bore and fuel should be drawn in by the carbs either way if I'm right in saying?Now when riding along a straight and level at a constant speed the bike, is quite jerky like it constantly wants more throttle, could the fuel pump be forcing too much fuel in? Or maybe it's the engine not being suited to the road being 1260?Any opinions much appreciated! Quote Link to comment
Fula28 Posted July 27, 2015 Share Posted July 27, 2015 You don't need it unless it's remote tank or such, the fuel gravity feed would suffice am pretty sure! Carbs would only need 2psi anyways ! Had it got regulator too? Quote Link to comment
ads54 Posted July 27, 2015 Author Share Posted July 27, 2015 No regulator just inline filter. Quote Link to comment
vizman Posted July 27, 2015 Share Posted July 27, 2015 it don't need a fuel pump Quote Link to comment
Duckndive Posted July 27, 2015 Share Posted July 27, 2015 Without a regulator it will def be getting to much fuel from a pump...but like has been said you should not need a pump in the 1st place......Pics would be good we like piccys ............. 1 Quote Link to comment
Burnout Posted July 27, 2015 Share Posted July 27, 2015 it may have had nos a wet kit likes a pump . Quote Link to comment
ads54 Posted July 28, 2015 Author Share Posted July 28, 2015 Will sort some pics out asap Quote Link to comment
Buddy Posted July 28, 2015 Share Posted July 28, 2015 Gis a go mister, 1260 gotta be fun, 1 Quote Link to comment
Gixer1460 Posted July 28, 2015 Share Posted July 28, 2015 Without a regulator it will def be getting to much fuel from a pump...but like has been said you should not need a pump in the 1st place......Pics would be good we like piccys ............. Could always use a proper bike pump like older R1 used - interupter style so doesn't over pressure the float valve. If the tap is close to the float height then gravity flow will reduce the less fuel there is in the tank and flow could diminish enough that starvation could occur on a 1260 motor @ WOT? Quote Link to comment
ads54 Posted July 29, 2015 Author Share Posted July 29, 2015 I'll do a bit more digging when I can get some time on it. There must be a reason it's been fitted in the first place. Quote Link to comment
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