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150cc GY6 and Under Engine Tech GY6 and Smaller Technical Discussion Forum

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  #1  
Old 01-17-2014, 07:08 AM
wildbob wildbob is offline
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Default Thinking of ditching the 30mm pumper..

I haven't put on the BBK and 4V heads yet, but still haven't been able to get my buggy running right with the 30mm pumper, riser combo. It starts great, idles great, but tends to bog still from throttle input at stopped or slow speeds. I'm still inclined to think it's just too much carb. Runs great once you get going. Right now I've got a #35 pilot (smallest I can get I think) and a #132 main. I've been thinking of going with a smaller mikuni carb. Other than the fact that they're more complex to get jetted and use a different type of throttle cable, i've heard nothing but good stuff about them.
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2013 Trailmaster XRX 150 Type 86 stroker
Taida 4V head with 23/22mm valves, forged 4V piston,Taida 62mm jug,forged Taida 8200 KDU stroker crank, Koso high-flow oil pump, Taida case half w/ oil cooler ports, Setrab oil cooler,TrailTec Vapor, Mikuni VM26-606, aluminum 30mm intake, Uni filter, aluminum stack, Hammerhead racing exhaust, MotoRio adjustable CDI/HO Coil, Iridium plug, Full Dr Pulley CVT kit w/ 16g sliders, JD's Mikuni slide kit

2014 Kandi 90B
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  #2  
Old 01-17-2014, 08:13 AM
Dirtroad Dirtroad is offline
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Just put your stock carb back on. I dont see any reason to install a 30mm carb on these little 150's.
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2009 ASW Carbide Uni filter, outerwears, redneck intake, 130 main jet, 38 pilot jet, drilled exhaust, DR Pulley 9g sliders, 2000rpm clutch spring, adjustable CDI and 39T sprocket

2009 ASW Carbide 39T sprocket, DR Pulley 10g sliders, drilled exhaust

2010 ASW Vector bone stock
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  #3  
Old 01-17-2014, 11:30 PM
rich1 rich1 is offline
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Quote:
Originally Posted by wildbob View Post
I haven't put on the BBK and 4V heads yet, but still haven't been able to get my buggy running right with the 30mm pumper, riser combo. It starts great, idles great, but tends to bog still from throttle input at stopped or slow speeds. I'm still inclined to think it's just too much carb. Runs great once you get going. Right now I've got a #35 pilot (smallest I can get I think) and a #132 main. I've been thinking of going with a smaller mikuni carb. Other than the fact that they're more complex to get jetted and use a different type of throttle cable, i've heard nothing but good stuff about them.
Im running a Kiehin 30 pumper with no problems.Instant throttle response and able to prime the motor too. However some of the cheap knock off carbs are junk. There is really no such thing as too much carb .The larger carb gives you more air thats good but you have to add more gas ! The bog that you are talking about means the carb is lean , you need to add more gas not less. I have run a 40 mm on a 125 cc motor !
Plug reading / chop tells the truth, its the only way to do it right. Im running a 38 pilot and a 145 main , 2 turns out on the idle mixture screw.
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Dazon 150 single Mods ...Uni-Filter, 30 mm Kiehin pumper carb, FMF power pipe, 30 mm Intake pipe, Hi Rev CDI, Orange HV coil, 10,000 rpm Tiny Tach,Works Performace Shocks 12" F Blaster 14" R . Pearl Perf Ceramic 13.5 rollers, Gates Power Belt,Kenda Claws F&R
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Old 01-18-2014, 07:21 PM
wildbob wildbob is offline
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I just rejetted to #40-#140 jets.. Seems to work good, no bog revving in neutral, but it's snowing like heck outside, so can't take it for a diagnostic spin. I just feel like I've been all over the map for jetting. It'll seem ok with big jets- then better with smaller jets. I can't detect any air leaks, maybe my carb just blows..
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2013 Trailmaster XRX 150 Type 86 stroker
Taida 4V head with 23/22mm valves, forged 4V piston,Taida 62mm jug,forged Taida 8200 KDU stroker crank, Koso high-flow oil pump, Taida case half w/ oil cooler ports, Setrab oil cooler,TrailTec Vapor, Mikuni VM26-606, aluminum 30mm intake, Uni filter, aluminum stack, Hammerhead racing exhaust, MotoRio adjustable CDI/HO Coil, Iridium plug, Full Dr Pulley CVT kit w/ 16g sliders, JD's Mikuni slide kit

2014 Kandi 90B
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  #5  
Old 01-19-2014, 08:13 PM
rich1 rich1 is offline
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I did not notice at first but you are using a riser on the carb . Those type of intakes are very hard to jet properly . A straight thru intake is the best way if you can get it between the frame.
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Dazon 150 single Mods ...Uni-Filter, 30 mm Kiehin pumper carb, FMF power pipe, 30 mm Intake pipe, Hi Rev CDI, Orange HV coil, 10,000 rpm Tiny Tach,Works Performace Shocks 12" F Blaster 14" R . Pearl Perf Ceramic 13.5 rollers, Gates Power Belt,Kenda Claws F&R
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  #6  
Old 01-21-2014, 12:34 PM
wildbob wildbob is offline
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Rich, could you get by the bar without it?
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2013 Trailmaster XRX 150 Type 86 stroker
Taida 4V head with 23/22mm valves, forged 4V piston,Taida 62mm jug,forged Taida 8200 KDU stroker crank, Koso high-flow oil pump, Taida case half w/ oil cooler ports, Setrab oil cooler,TrailTec Vapor, Mikuni VM26-606, aluminum 30mm intake, Uni filter, aluminum stack, Hammerhead racing exhaust, MotoRio adjustable CDI/HO Coil, Iridium plug, Full Dr Pulley CVT kit w/ 16g sliders, JD's Mikuni slide kit

2014 Kandi 90B
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  #7  
Old 01-21-2014, 03:59 PM
Dirtroad Dirtroad is offline
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Wildbob and rich1, post some pics of your setups if you can.
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2009 ASW Carbide Uni filter, outerwears, redneck intake, 130 main jet, 38 pilot jet, drilled exhaust, DR Pulley 9g sliders, 2000rpm clutch spring, adjustable CDI and 39T sprocket

2009 ASW Carbide 39T sprocket, DR Pulley 10g sliders, drilled exhaust

2010 ASW Vector bone stock
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  #8  
Old 01-22-2014, 06:20 AM
wildbob wildbob is offline
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The motor's sitting on a work bench right now, putting in a BBK and 4V heads and full Dr Pulley CVT upgrade. But I'll through up pics of how it was set up.
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2013 Trailmaster XRX 150 Type 86 stroker
Taida 4V head with 23/22mm valves, forged 4V piston,Taida 62mm jug,forged Taida 8200 KDU stroker crank, Koso high-flow oil pump, Taida case half w/ oil cooler ports, Setrab oil cooler,TrailTec Vapor, Mikuni VM26-606, aluminum 30mm intake, Uni filter, aluminum stack, Hammerhead racing exhaust, MotoRio adjustable CDI/HO Coil, Iridium plug, Full Dr Pulley CVT kit w/ 16g sliders, JD's Mikuni slide kit

2014 Kandi 90B
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  #9  
Old 01-24-2014, 06:23 PM
rich1 rich1 is offline
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Default carb

This is the set- up Im using on the Dazon . BTW..starting this weekend this Dazon is for SALE ! More later...
Attached Images
File Type: jpg Dazon 008.jpg (93.5 KB, 17 views)
File Type: jpg Dazon 001.jpg (100.8 KB, 15 views)
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Dazon 150 single Mods ...Uni-Filter, 30 mm Kiehin pumper carb, FMF power pipe, 30 mm Intake pipe, Hi Rev CDI, Orange HV coil, 10,000 rpm Tiny Tach,Works Performace Shocks 12" F Blaster 14" R . Pearl Perf Ceramic 13.5 rollers, Gates Power Belt,Kenda Claws F&R
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  #10  
Old 01-25-2014, 01:56 PM
rich1 rich1 is offline
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Quote:
Originally Posted by wildbob View Post
Rich, could you get by the bar without it?
Ive got the correct 30 mm Alum carb intake $25.00 you need in my parts for sale ad .....shoot me a pm or call.
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Dazon 150 single Mods ...Uni-Filter, 30 mm Kiehin pumper carb, FMF power pipe, 30 mm Intake pipe, Hi Rev CDI, Orange HV coil, 10,000 rpm Tiny Tach,Works Performace Shocks 12" F Blaster 14" R . Pearl Perf Ceramic 13.5 rollers, Gates Power Belt,Kenda Claws F&R
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