dannymccann
Member
Registered: 9th Aug 06
Location: Doddington, Lincolnshire
User status: Offline
|
Bit of a long shot but here we go! I've got a '96 Kawasaki ER5 commuter motorbike. Recently developed a terrible hesitation between 1k - 5k RPM in every gear, which makes it impossible to ride. It's really dangerous especially when turning against the traffic as you will get half way across and then it just dies (but doesn't stall). It stutters, burps, farts, misfires, the whole nine yards. So far to fix it I've done:
- Carbs off twice, blown through with an airline (everywhere)
- New plugs, caps, leads and coils
- New air filter, there isn't a fuel filter
- New fuel tap diaphragm
- Different fuels, tried with the tap on ON, PRI, RES
- New fuel pipe on reserve line as previous one had perished, other pipe looks fine but got a couple of jubilee clips on the way to also replace it in due course
- Checked fuel lines for kinks and bends, nothing
- Carbs balanced with a vacuum gauge, they are both spot on
- Carb diaphragms in good condition
- Carb float height set back to 17mm (it's actually 17.2mm on the vernier) as per service manual (which specs +-2mm)
- Plug gap was bang on at 6mm, still ran like shit so moved it to 7mm and no difference
- Inspection of the old plugs revealed black deposits on left cylinder and normal colour on right, now looking at new plugs both are black (which would indicate overfuelling???)
Just cannot get it to run right - idles perfectly, starts perfectly even on a freezing morning or after being left for a week as per this morning.
Any ideas?!
|
_Allan_
Member
Registered: 24th Mar 04
User status: Offline
|
It have a manual choke? Possibly sticking cable?
Overfueling from that even if you think the lever is off.
I had this on my NSR250. Fouled the plugs after a few hundred miles etc...
|
DaveyLC
Member
Registered: 8th Oct 08
Location: Berkshire
User status: Offline
|
Carb floats sticking?
|
Tiger
Member
Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline
|
Checked the timing?
|
Gary
Premium Member
Registered: 22nd Nov 06
Location: West Yorkshire
User status: Offline
|
quote:
Originally posted by _Allan_NSR250.
|
dannymccann
Member
Registered: 9th Aug 06
Location: Doddington, Lincolnshire
User status: Offline
|
Manual choke yes and we've verified this morning it isn't sticking, can see it moving on and off freely when we had the carbs out earlier.
Floats were also adjusted this morning, when you hold the carb upside down they bounce around as they should. They were out by 4mm which was corrected.
Not looked at timing... I'll add it to the next list of stuff to look at
|
