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Bs34 cold start
- vonbagh
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- newOld_kz1000
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Did the bike start okay before?
Also -- are you running the stock airbox or pods? If you run pods, it would be easy to pull one or more off for a quick starter-fluid test, such as trying to get it started by spraying starter fluid into the back of the carbs?
Other things that will cause hard starting include valves being out of adjustment.
How many miles are on the bike? If the mileage is high, doing a valve clearance check will eliminate a possible contributor.
The starter fluid sprayed into the carbs will tell a tale. If you can get her going with starter fluid and she stays running, it could well mean your choke circuit is ineffective.
Even though you can't get it warmed up to do a compression test, you can do a 'cold' compression test and get an idea of the valves and the cylinder wear.
1978 kz1000 A2 with Kerker
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- vonbagh
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By the way, when i go those carbs, the rod which pulls those four enrichment plungers was slightly bent. I straightened it. Could this be something which makes enrichment circuit work improperly?
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- newOld_kz1000
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1978 kz1000 A2 with Kerker
1980 Z1 Classic with Kerker
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- vonbagh
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- Motor Head
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- FIX UP YOUR BIKE RIGHT AND CHEAP
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vonbagh wrote: I have Mikuni bs34 carbs on my kz750. Carbs are very well cleaned, pod filters, 140 mainjet and 40 pilot jet, pilot screw 2 1/2 turns out, fuel level is adjusted 3mm from carb body. But, bike wont start. It started once when i adjusted fuel levels very high, but it run rich. I dont twist throttle when I start, so there should be more vacuum for enrichmen circuit. After I tried to start, I removed carbs and noticed that fuel wont rise up from float bowl. I have checked that small brass tube which feeds fuel for enrichment circuit, and it is clean. What should I check next. Is it possible that those enrichmnet plungers leaks and makes vacuum weaker?
How is the corresponding hole at the float bowl, for the starter circuit? The little brass tube goes into a bore in the bowl, there is an orifice at the bottom, and it must be clear to get fuel.
Are those BS34 carbs from a Kawasaki? Or something else? Do you know what model they are from?
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
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- vonbagh
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Those mikunis are from gpz750 1984 i think.
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- TeK9iNe
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Turn those mixture screws out till she starts with full choke and increase the idle screw a couple turns.
If it still needs more fuel, then change the pilot up to a 42.5, but I doubt it will.
Do it.
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
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- vonbagh
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- vonbagh
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Those carbs seems to hate me.
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- ELCouz
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Why that intake popping?
To get this thread done...
It usually happens when there's a lean condition (ex: vacuum leak, lean adjustment) and a cold engine.
Problem usually gets away when engine reach optimal running temperature.
Or bad engine timing could cause this (Ex: spark plugs firing when intake valves are not closed yet!)
Hope this help!
Best regards,
laurent
1982 KZ810-R1 GPZ with hindle 4-into-1 pipe
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