Sputters& Pops

ChipToothy · 03-22-2023, 04:43 PM

Hey gang!

Why after 4 years would “The Storm” start literally out of the blue surging and stalling at high RPM’s?

I tried switching to my spare CDI but it changed nothing. Lowered the float a mm in the ol’ V26 and all that did was make the exhaust pop super loud. Jets and everything is all clean so I’m stumped!

The bike will idle and run low thru the mid RPM ranges for forever. Air Pod I changed to new just because and I haven’t moved the needle height or rejetted since the bike was new and dialed in. I was planning on replacing the V26 anyways as last month it developed a little bowl drip if you leave the pedcock on.

XLsior · 03-22-2023, 04:51 PM

a high rpm surge/stall to me sounds like either fuel starvation or an air/vacuum leak.

So I would start to inspect the fuel lines, tank cap, screens, filters, gaskets and manifolds...

**JerryHawk250** · 03-22-2023, 05:34 PM

I agree with XLsior. Have you checked valve adjustment?

buzz · 03-22-2023, 07:19 PM

spark plug,cheap place to start.

Thumper · 03-23-2023, 06:05 AM

Could the coil fail to keep up at higher discharge frequencies? Coils are cheap. Nibbi for $20 to test this theory...

03-22-2023, 04:43 PM	#1
ChipToothy Join Date: Apr 2018 Posts: 819	Sputters& Pops Hey gang! Why after 4 years would “The Storm” start literally out of the blue surging and stalling at high RPM’s? I tried switching to my spare CDI but it changed nothing. Lowered the float a mm in the ol’ V26 and all that did was make the exhaust pop super loud. Jets and everything is all clean so I’m stumped! The bike will idle and run low thru the mid RPM ranges for forever. Air Pod I changed to new just because and I haven’t moved the needle height or rejetted since the bike was new and dialed in. I was planning on replacing the V26 anyways as last month it developed a little bowl drip if you leave the pedcock on. __________________ Bashan Storm: Ebay steel exhaust wrapped, folding shift lever, seat mod, vm26 carb, air pod, dual led scrambler headlamps, windshield mod, led brake/tail light, secondary led brake light (swingarm), Ebay 295mm rear shock, back up CDI (racing unknown), oil cooler, digital gauge cluster,
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03-22-2023, 05:34 PM	#3
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,581	I agree with XLsior. Have you checked valve adjustment? __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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03-23-2023, 06:05 AM	#5
Thumper Join Date: Feb 2021 Location: Kansas City Posts: 2,389	Could the coil fail to keep up at higher discharge frequencies? Coils are cheap. Nibbi for $20 to test this theory... __________________ -2022 5 speed Templar X Orange, OEM 51T rear sprocket, 14T front sprocket -NOS 2020 KTM 250SX (2-stroke motocross), less than 10 hours on it
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03-22-2023, 04:51 PM	#2
XLsior Join Date: Aug 2020 Location: Australia Posts: 1,318	a high rpm surge/stall to me sounds like either fuel starvation or an air/vacuum leak. So I would start to inspect the fuel lines, tank cap, screens, filters, gaskets and manifolds...
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03-22-2023, 07:19 PM	#4
buzz Join Date: Dec 2020 Location: Dayton Pa. Posts: 880	spark plug,cheap place to start.
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