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Only running on choke.
- petesmith999
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22 Aug 2012 03:03 #544024
by petesmith999
Only running on choke. was created by petesmith999
Hi guys, I've got an old kz750 h2, which was stored for 6 years. I have fitted a new dyna s ignition system and coils. Previous owner said carbs were serviced but I'm doubting this. The problem is the bike starts and runs fine on choke, but as soon as the choke is dropped down I get a sort of cam chain sounding rattle and it dies. I think I need to strip and clean the carbs but could this also be the cause of the rattle? I'm guessing if one or more jets are blocked it could cause this. Any tips?
Cheers
Pete
Cheers
Pete
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- 650ed
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22 Aug 2012 08:36 #544045
by 650ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic Only running on choke.
What rpm is the idle set at? Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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22 Aug 2012 09:03 #544047
by petesmith999
Replied by petesmith999 on topic Only running on choke.
hi ed,
Idle a bit tricky to set, thats why i'm thinking carbs still a bit gummed up. I can adjust with choke on but it dies as soon as choke is turned off, even blipping the throttle it still dies. Runs fine on choke though. Tried setting idle with choke at 3500, still died when choke turned off.
Cheers
Pete
Idle a bit tricky to set, thats why i'm thinking carbs still a bit gummed up. I can adjust with choke on but it dies as soon as choke is turned off, even blipping the throttle it still dies. Runs fine on choke though. Tried setting idle with choke at 3500, still died when choke turned off.
Cheers
Pete
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22 Aug 2012 10:38 #544061
by 650ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic Only running on choke.
I agree. It sounds like cleaning the carbs is the next step. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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22 Aug 2012 10:53 #544065
by petesmith999
Replied by petesmith999 on topic Only running on choke.
Cheers ed, looks like a job for the weekend
Pete
Pete
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01 Sep 2012 17:49 #546090
by petesmith999
Replied by petesmith999 on topic Only running on choke.
Well, stripped the carbs, no 3 main was caked with crap and all the others had blockages everywhere. All now spotless and running without choke so problem No1 gone. Next is the low rpm rattle, think its the cam chain tensioner as its an unreliable automatic one.
Still happy the carbs are done.
Still happy the carbs are done.
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- Motor Head
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- FIX UP YOUR BIKE RIGHT AND CHEAP
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02 Sep 2012 14:39 #546230
by Motor Head
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...
Replied by Motor Head on topic Only running on choke.
Chain may be rattling from carbs out of sync. have you done a Running Dynamic Sync, with a Manometer? this may quiet it down if it is noisy at Idle.
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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03 Sep 2012 10:06 #546346
by petesmith999
Replied by petesmith999 on topic Only running on choke.
Thanks motor head, will try this next, still don't trust that auto cam chain tensioner though.
Pete
Pete
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