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Author Topic: Quick throttle ?  (Read 389 times)

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Offline evopgt

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Quick throttle ?
« on: June 17, 2017, 07:44:23 AM »
Seems as though the bike stumbles under quick throttle pull?? Carb issue??
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Offline eigenvector

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Re: Quick throttle ?
« Reply #1 on: June 17, 2017, 08:18:16 AM »
Yes.

I would say too lean without knowing all the details - but it could just as easily be too rich (but I find that less common).  It's the reason why people hate tuning carbs - too much or too little fuel often have common symptoms.
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Rob
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2018 HD Softail Heritage
1979 CB750K Limited Edition
1977 CB550K
1984 CB700SC Nighthawk
1983 VF750S Sabre

Offline TwoTired

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Re: Quick throttle ?
« Reply #2 on: June 17, 2017, 08:58:59 AM »
Do your carbs have accelerator pumps?  If not, quick full twist will make the engine stumble.  But, it should take 1/2 throttle twist and accelerate reliably.
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Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

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Offline BomberMann650

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Re: Quick throttle ?
« Reply #3 on: June 17, 2017, 10:54:46 AM »
TwoTired is right.
These old motorcycle carburetors are often a bit slow on the uptake.
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