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Post by Admin on Apr 10, 2006 14:01:14 GMT -5
Old trick I learned from the wise. Cold temps mean it'll run lean. It needs more fuel, less air to start. Stuff a rag into the air intake while starting. Remove the rag once it's running. Works like a charm.
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Post by Doug on Apr 10, 2006 20:02:13 GMT -5
Hey, That sounds like a modified manual choke
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Post by stevie37 on Feb 12, 2007 22:39:32 GMT -5
Dawg, Will this also work on a 150cc Phantom R4I Scooter?
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Post by ryan_ott on Feb 12, 2007 22:43:55 GMT -5
Mine starts 1st try every time no matter the temp mine is also a little rich
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Post by earlwb on Feb 14, 2007 17:57:50 GMT -5
When it is pretty cold outside, mine starts up easily enough, but seemingly takes forever to warm up though. That rag in the intake sure sounds like a modified choke to me too.
I'll keep that in mind if I run into an issue like that.
I am sort of old fashioned, I really loved the old British Bike tickler on the carbs. You pushed in a little button a few times, on the that worked like a plunger, to dribble a little fuel into the carb throat. Then gave the big heave ho on the kick start. They usually fired right up no problem then.
I am surprised no one made a manual enrichener unit to replace the automatic enrichener on the scooter carbs. Seems like someone could have done it easily enough. I haven't yet taken apart a scooter carb yet to see how that works though.
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Post by jspencer on Feb 16, 2007 8:24:37 GMT -5
If a scooter carb works like other carbs I've seen, it has an accelerator pump that operates as the throttle opens. In that case, you can put some extra gas into the intake by goosing the throttle a couple of times before starting.
Does anybody know enough about the internals of these carbs to know if this is true for scooters?
Otherwise, some starting fluid usually does the trick.
Jon
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Post by sussexscooterhead on Feb 16, 2007 9:07:31 GMT -5
The stock scooter carb does not have any accelerator pump. It has an electrically operated 'choke' that provides the engine with extra fuel during start-up. It's likely that when temps drop significantly it isn't able to supply enough extra fuel and so choking the engine with a rag or using starting fluid is necessary. Earl, you can see on this site how he added a primer to the CVK. www.rc-trucks.org/gy6-engine-performance.htm |
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Post by earlwb on Feb 16, 2007 10:34:53 GMT -5
Cool, looks pretty good. I found more details in this ATV forum thread here www.buggynews.com/topic5797.htmlI think I'll have to get a spare carb and study the automatic enrichener circuit some more. Maybe I can machine up a manual enrichener unit like I have on my Harley Sportster. Oh yeah, they don't have an accellerator pump on the stock CV carbs on the scooters. But there are a couple aftermarket carbs and maybe a couple of small motorcycle carbs that have accelerator pumps. Acceperator pumps impact your fuel mileage significantly, so everyone doesn't put them on the scooters. |
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Post by jackthefuzz on Feb 16, 2007 12:55:15 GMT -5
for those of you running in cold temps using the stock walbro or upgraded 30MM CVK, just turn the slow speed screw half turn richer. start right up. Also placing your hand or a rag over the carb while turning the engine over will get it to start too
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Post by stevie37 on Jun 28, 2007 13:32:23 GMT -5
I have a 2006 Viva Phantom R4I scooter and when I try to start the
scooter I hear a grinding sound.
Just had a new starter put in the scoot a week ago that came out
of a go cart, could this be the problem? I also brough a starter and
tryed this as well and got the same result, what could be wrong? Could
it be the cluch?
Please HELP as I am at a loss on what to do.
Thanks from Steve
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