Gpz 900R splutter

[bluepaul]

Hi Guys, got a slight problem with my old 1984 Gpz 900r.
When she's warmed up and from standstil pulling away she hesitates from low revs but if i gun it ,she revs no worries. This only happens at low revs ( 1200-2500rpm) in nearly all the gears. Idle is ok, it's just when you go to pull away you think you are out of petrol when your'e not.
HELP.
Paul

[robracer]

Hi Paul welcome to KSRC Your carbs probably need a really good clean...... as in disassembly & clean
sounds like the primary jets could be gummed up & there is nothing like a carb overhaul & sync to bring back the old girl.

[waynemorgan]

Welcome to KSRC Paul

Sorry I have no idea what the problem may be. Listen to Rob and the other experienced riders here - you won't go wrong

[bonester]

Mine did it a bit too when I had my 900- I think from memory I had dodgy needles and seats. Might be a small hole in the fuel tap diaphragm too. Common problem with the GPZ.

[IsleofNinja]

Again welcome to KSRC Paul - there are a few resident GPZ guru's on here so you should be fine .

GPZ900r's have a big issue with the carb boots not sealing properly (head side) mainly due to oil contaminated (soft) engine mounts and an airbox designed by complete F/wits as far as serviceability is concerned!?

1st - with the bike running @ idle and up to operating temp , CO cleaner or similar at each carb boot. if the idle smoothes out / revs rise, you have an air leak which will cause the issues you describe.

Next ; refer Robs post.
Rob is onto it

[bluepaul]

Thanks guys for the advise, looks like a spanners weekend whoo hoo. Paul

[IsleofNinja]

Hey Paul
Keep an eye on fleecebay for CARBURETTOR BALANCE GAUGE / CARBURETTOR SYNCHRONISER GAUGE sets.. they are on from time to time ex USA normally. Bout $120.00 for a decent gauge set you would pay $400 + easily retail here . Not to hard to use but the results of a nicely balanced set of carbs is AWESOME . Once you check for air leaks and make sure the carbs bowls are clean/pilots even etc , carb synch is the next step .

>>>Just make sure you take said gauge set plus a box of main and air bleeds in case you find yourself too high up a mounain pass or something .......






Just ask Gos ,,,, he'll explain what I mean