morning all
Finally got to the point of being able to fire up the bike yesterday, and appear to have a couple of issues.
1. RH cylinder not firing despite a good spark, spot on timing and fuel .... confused
2. Engine runs on two of the cylinders on choke, but if it open the throttle it just stalls.
Guess I’ll sort problem one then worry about two ! Tempted to try changing the coil as I think I’ve pretty much checked everything else.
Ideas welcome before I start head butting the garage wall !!!
Mmm ...... another 550J puzzle, any ideas ?
- Hix2061
- Posts: 84
- Joined: Tue Aug 16, 2016 9:01 am
Mmm ...... another 550J puzzle, any ideas ?
1976 Suzuki GT550A
1973 Suzuki GT550J
Bultaco Sherpa350
Ducati multistrada
1973 Suzuki GT550J
Bultaco Sherpa350
Ducati multistrada
- Hix2061
- Posts: 84
- Joined: Tue Aug 16, 2016 9:01 am
Re: Mmm ...... another 550J puzzle, any ideas ?
Ok, so a bit more checking this afternoon. Primary and secondary resistance figures for all coils as they should be . Compression figures for all cylinders between 130 and 140, so also fine. Timing rechecked with a strobe light, new plugs fitted...... still the same issue on the rh cylinder.
Very confused now
Very confused now
1976 Suzuki GT550A
1973 Suzuki GT550J
Bultaco Sherpa350
Ducati multistrada
1973 Suzuki GT550J
Bultaco Sherpa350
Ducati multistrada
- itsnotateapot
- Posts: 1179
- Joined: Thu Feb 16, 2012 10:09 pm
- Location: Sheffield, South Yorkshire
Re: Mmm ...... another 550J puzzle, any ideas ?
Have you got a good fully charged battery on it.
SUZUKI GT750 L
SUZUKI T500 M
SUZUKI GT185 K
Suzuki T500 Cobra
Suzuki GTS 500 Hybrid.
Suzuki RG250.
SUZUKI T500 M
SUZUKI GT185 K
Suzuki T500 Cobra
Suzuki GTS 500 Hybrid.
Suzuki RG250.
- canaletto5
- Posts: 5228
- Joined: Tue Jul 23, 2013 8:43 pm
- Location: Derbyshire
Re: Mmm ...... another 550J puzzle, any ideas ?
Have you checked the exhaust pipe is clear of carbon build up ?Hix2061 wrote:Ok, so a bit more checking this afternoon. Primary and secondary resistance figures for all coils as they should be . Compression figures for all cylinders between 130 and 140, so also fine. Timing rechecked with a strobe light, new plugs fitted...... still the same issue on the rh cylinder.
Very confused now
-
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- Location: Sunny Wales
Re: Mmm ...... another 550J puzzle, any ideas ?
Have you cleaned the carbs.Pilot jets.
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- Posts: 3118
- Joined: Wed Sep 26, 2012 7:33 pm
- Location: Prestatyn.Wales
Re: Mmm ...... another 550J puzzle, any ideas ?
+1 pilot jets blocked or pilot and pilot bypass circuit blocked. Although non firing cylinder gets fuel, is the choke opening okay? It needs enrichment to fire.
Incorrect float level? Either too high or more likely too low.
Sticking diaphragm in petrol tap, remember petrol for choke is drawn from bottom of the bowl. Try starting with tap on prime.
Incorrect float level? Either too high or more likely too low.
Sticking diaphragm in petrol tap, remember petrol for choke is drawn from bottom of the bowl. Try starting with tap on prime.
NO SMOKE .......NO POKE
- Hix2061
- Posts: 84
- Joined: Tue Aug 16, 2016 9:01 am
Re: Mmm ...... another 550J puzzle, any ideas ?
Yep, it’s a new battery, but have just checked and it’s not charging, so that may be part of the problem. I have a spare, so will swop it over today and see what happens. Thanks for your help. Cheersitsnotateapot wrote:Have you got a good fully charged battery on it.
1976 Suzuki GT550A
1973 Suzuki GT550J
Bultaco Sherpa350
Ducati multistrada
1973 Suzuki GT550J
Bultaco Sherpa350
Ducati multistrada
- Hix2061
- Posts: 84
- Joined: Tue Aug 16, 2016 9:01 am
Re: Mmm ...... another 550J puzzle, any ideas ?
Have ultrsonically cleaned all carbs, and checked the jets are clear with an airline, so these should be ok. Fuel is getting to the carbs on prime, but not on reserve, so maybe I need to check the diaphragm too. The bike will only just tick over with full choke. Choke system appears to be operating ok, and moves freely. Have also reset the float heights to 25.8mmbarney01 wrote:+1 pilot jets blocked or pilot and pilot bypass circuit blocked. Although non firing cylinder gets fuel, is the choke opening okay? It needs enrichment to fire.
Incorrect float level? Either too high or more likely too low.
Sticking diaphragm in petrol tap, remember petrol for choke is drawn from bottom of the bowl. Try starting with tap on prime.
Will have a look at the diaphragm.
Thanks for your help
Cheers
1976 Suzuki GT550A
1973 Suzuki GT550J
Bultaco Sherpa350
Ducati multistrada
1973 Suzuki GT550J
Bultaco Sherpa350
Ducati multistrada
- Hix2061
- Posts: 84
- Joined: Tue Aug 16, 2016 9:01 am
Re: Mmm ...... another 550J puzzle, any ideas ?
Yep, three of the four have been rechecked and I’ve had them running on my other 550, so should be ok.canaletto5 wrote:Have you checked the exhaust pipe is clear of carbon build up ?Hix2061 wrote:Ok, so a bit more checking this afternoon. Primary and secondary resistance figures for all coils as they should be . Compression figures for all cylinders between 130 and 140, so also fine. Timing rechecked with a strobe light, new plugs fitted...... still the same issue on the rh cylinder.
Very confused now
1976 Suzuki GT550A
1973 Suzuki GT550J
Bultaco Sherpa350
Ducati multistrada
1973 Suzuki GT550J
Bultaco Sherpa350
Ducati multistrada
-
- Posts: 3118
- Joined: Wed Sep 26, 2012 7:33 pm
- Location: Prestatyn.Wales
Re: Mmm ...... another 550J puzzle, any ideas ?
Just sayin' took me two or three attempts in the ultrasonic cleaner to finally get them clear.
How rusty is your fuel tank inside. Are you using in line filters? Jets soon block up again if you don't
How rusty is your fuel tank inside. Are you using in line filters? Jets soon block up again if you don't
NO SMOKE .......NO POKE