TonyGee Posted March 3, 2021 Share Posted March 3, 2021 try turning them in, when an engine is idling smooth and you screw them in the idle will drop. thats when you screw them back out to get the mixture somewhere near, it might help but it might cause a flat spot !!! im just grasping at straws now Quote Link to comment
SATANSAM Posted March 4, 2021 Author Share Posted March 4, 2021 7 hours ago, TonyGee said: try turning them in, when an engine is idling smooth and you screw them in the idle will drop. thats when you screw them back out to get the mixture somewhere near, it might help but it might cause a flat spot !!! im just grasping at straws now So damn frustrating! By the way, I made a proper compression teat opening the throttle totally with warm engine, all cylinder 160psi except for cyl 3 that has 150psi. Quote Link to comment
SATANSAM Posted March 10, 2021 Author Share Posted March 10, 2021 Well, I'm getting there....I separated the airbox and clogged 1 air jet with my finger and the bike changed so much (to good). Manual says it must use #155 air jets, and it's got #190 air jets (seems like all gsx750es carbs have 190 in Spain for some reason), so I'm ordering 4 x #155 air jets, pretty sure I'll be able to sync the carbs without the bike revving like a drunk angry ex girlfriend. Morning! Quote Link to comment
Shakey225 Posted March 10, 2021 Share Posted March 10, 2021 That sounds like a potential new line of inquiry - keep going! 1 Quote Link to comment
SATANSAM Posted March 10, 2021 Author Share Posted March 10, 2021 1 hour ago, Shakey225 said: That sounds like a potential new line of inquiry - keep going! Yep! And I've got so many air jets at home that I'm going to clog 4 of them with flux, tin and a small flame (solder basically) and drill with a 1,30mm drill to start wirh (as the hole will be bigger than #130...around #140 or so) Fingers crossed! 1 Quote Link to comment
Shakey225 Posted March 10, 2021 Share Posted March 10, 2021 Fingers crossed for you! Quote Link to comment
TonyGee Posted March 10, 2021 Share Posted March 10, 2021 fecking hell, ive got my bollox crossed Quote Link to comment
SATANSAM Posted March 10, 2021 Author Share Posted March 10, 2021 Hahaha had to try it, but no...Still the same....Well, some small changes...Man, no fckin idea...Would ADVANCED IGNITION TIMING do this? Quote Link to comment
TonyGee Posted March 10, 2021 Share Posted March 10, 2021 1 hour ago, SATANSAM said: Hahaha had to try it, but no...Still the same....Well, some small changes...Man, no fckin idea...Would ADVANCED IGNITION TIMING do this? do you mean an ignition advancer ? Quote Link to comment
SATANSAM Posted March 12, 2021 Author Share Posted March 12, 2021 On 3/10/2021 at 10:59 PM, TonyGee said: do you mean an ignition advancer ? I mean ignition timing off, out of point...A friend told me "That's the problem!" But the closest thing to a bike he's touched is a bicycle. Quote Link to comment
SATANSAM Posted March 12, 2021 Author Share Posted March 12, 2021 The air jets didn't make much difference, the needles are all in middle position, all jets are correct, diaphragms like new, height floats correct, orings new,.... Re cleaning this set of carbs to be 110% that it's not a dirty carb issue... After that, if nothing changes, I'll check valve clearence AGAIN. Quote Link to comment
SATANSAM Posted March 15, 2021 Author Share Posted March 15, 2021 Found the issue HEAD GASKET Found a bit of oil between exhausts 4 and 3, sprayed contact cleaner and up she went, sprayed again and up she went again...Only there, and it's carb 3 the one with less vacuum and less compression. Correct me if I'm wrong. Thanx 4 everything folx, I've bloody well learnt how to clean a carb!!! 2 Quote Link to comment
Gixer1460 Posted March 15, 2021 Share Posted March 15, 2021 I dunno - it could be carb related ! ! ! . . . . . . . . . . . . . . . . . . . . ok i'm heading for the door LOL! 1 Quote Link to comment
Shakey225 Posted March 15, 2021 Share Posted March 15, 2021 1 hour ago, SATANSAM said: Found the issue HEAD GASKET Found a bit of oil between exhausts 4 and 3, sprayed contact cleaner and up she went, sprayed again and up she went again...Only there, and it's carb 3 the one with less vacuum and less compression. Correct me if I'm wrong. Thanx 4 everything folx, I've bloody well learnt how to clean a carb!!! Well well well. Congratulations on getting to the root of the problem! I never would have guessed h/g. Good thinking to spray around the area too. That was quite a ride! 1 Quote Link to comment
SATANSAM Posted March 15, 2021 Author Share Posted March 15, 2021 Anybody fancy a set of carbs? Quote Link to comment
TonyGee Posted March 15, 2021 Share Posted March 15, 2021 19 minutes ago, SATANSAM said: Anybody fancy a set of carbs? you'll be able to sell them as brand new now 1 Quote Link to comment
Captain Chaos Posted March 16, 2021 Share Posted March 16, 2021 8 hours ago, SATANSAM said: Anybody fancy a set of carbs? Are they clean? 1 Quote Link to comment
SATANSAM Posted March 16, 2021 Author Share Posted March 16, 2021 1 hour ago, Captain Chaos said: Are they clean? Hahahaha OK I'll shut up Quote Link to comment
SATANSAM Posted March 23, 2021 Author Share Posted March 23, 2021 Bench time. 1 Quote Link to comment
Gixer1460 Posted March 23, 2021 Share Posted March 23, 2021 Bit extreme! HG can be done in frame relatively easily FYI! Quote Link to comment
SATANSAM Posted March 23, 2021 Author Share Posted March 23, 2021 6 hours ago, Gixer1460 said: Bit extreme! HG can be done in frame relatively easily FYI! NOpe, anchor bolts are too long/high to get the cylinder head out. Quote Link to comment
Gixer1460 Posted March 24, 2021 Share Posted March 24, 2021 11 hours ago, SATANSAM said: NOpe, anchor bolts are too long/high to get the cylinder head out. I'm confused? Head is secured by studs and nuts, once the studs and washers are off you only need to lift the head about 2" to remove. Usually the pain is the cam chain tensioner blades but they all give in eventually. Many heads removed in frame on many bikes so it is definitely possible. Quote Link to comment
SATANSAM Posted March 25, 2021 Author Share Posted March 25, 2021 Well not on this one, top frame is low and not enough height to get the head out. It is possible on my other twin bike, I know what you mean. Anyway, head gasket leaking round studs on cyl 3. 1 Quote Link to comment
SATANSAM Posted April 8, 2021 Author Share Posted April 8, 2021 Well, everything assembled, timing on the spot, new valve seals, valve grinded, all gaskets new with grease, now just valve clearance and motor in. 2 Quote Link to comment
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