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#1 |
Join Date: Apr 2018
Posts: 54
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Magician CUTS OUT at full throttle.. Any ideas?
Hey!
I love my Magician. After a carb tuning, a new LED display, and some valve adjustments she starts right up every time. HOWEVER when I am at full throttle, and only at full throttle (7/8 throttle wont do this) the bike will cut out suddenly. Its like the RPMs just drop. My first thought was a fuel issue but it is less of a "bogging" feeling more of a sudden loss of power. The loss of power is sudden but the bike keeps going fine, it doesn't kill the engine just slows it, which at 50mph can feel like tapping the brakes without you planning on it. A bit scary. I have gone smaller with my main jet, and larger with my main jet. Has the same problem regardless. I have the upgraded NGK spark plug, maybe a poor coil? Could it be reeds? Maybe even a valve problem? Any ideas? Last edited by davisbm2; 10-11-2018 at 10:40 AM. |
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#2 |
Join Date: Jul 2018
Location: NEPA
Posts: 273
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My Hawk PZ30 carb did this when I got too optimistic with rejeting the main jet size. I drooped down 2 sizes and it went away. I could barely make it up a hill downshifting and all.
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2018 Hawk P&P Decked .040 off the head. 17/43 D.I.D. 428, NGK Iridium plug, DeCat, Wrapped pipe, Custom S.S. Muffler core, Nibbi PE30 115/35, L.E.D. Lights, Digital Cluster, USB port, Cutting Bord skid plate, Oil cooler w/ custom CRF oil filter inline, 5Wt fork oil, Rear Shock, CNC Back Rack, 30mm FAT bars, Bark Busters, ProGrips, Adjustable levers, Shinko 700’s lots of Loctite! |
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#3 |
Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,651
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Since you tried different jets that should rule that out. What size jets? Did you get true mikuni jets or the cheap set they sell on ebay and amazon? these are know for being inaccurately labeled. Visually inspect the jets and make sure they are different sizes. If the jets are good then it could be a weak coil or just a bad ground causing a weak spark.
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2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 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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#4 |
Join Date: Apr 2018
Posts: 54
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I got mid range jets off of Amazon, I think the ones recommended from Motocheez.
I can't remember what size is in there right now.. But the stock one was making it run very lean, so I went up one size and it ran much better but could be hard to start.... I then jumped up one more size and it has been very happy, minus the cutting out problem at full throttle. What size jets are you guys running? Also, can I visually check the strength of the spark, or should I use a multimeter? |
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#5 |
Join Date: Apr 2018
Posts: 54
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Also, I don't know much about reeds, do I need to be worried about them with an 8 month old bike with 500 miles? Are there any known issues with RPS Hawk/ Magician reeds?
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#6 |
Join Date: Jul 2018
Location: NEPA
Posts: 273
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2 strokes have reeds
4 strokes have Valves Unless there's something new out there?
__________________
2018 Hawk P&P Decked .040 off the head. 17/43 D.I.D. 428, NGK Iridium plug, DeCat, Wrapped pipe, Custom S.S. Muffler core, Nibbi PE30 115/35, L.E.D. Lights, Digital Cluster, USB port, Cutting Bord skid plate, Oil cooler w/ custom CRF oil filter inline, 5Wt fork oil, Rear Shock, CNC Back Rack, 30mm FAT bars, Bark Busters, ProGrips, Adjustable levers, Shinko 700’s lots of Loctite! |
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#7 |
Join Date: Apr 2018
Posts: 54
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Ah.. That moment when you learn something you should have known years ago..
So, let's get creative here... What else could cause my full throttle cutting out issues? I'm leaning towards electrical at this point.. thanks! |
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#8 |
Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,651
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What size jet do you have in it now?
__________________
2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 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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#9 |
Join Date: Jul 2018
Location: NEPA
Posts: 273
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I'd make a guess it's fuel or spark, Not air. I had a bad plug wire it would ground out and spark from the wire to the block, it killed the power band. I could only see it in the dark. I knew there was a problem I just couldn't find it.
Or Something can be off in the carb? Wrong jet, miss marked. Needle valve not installed correctly or what ever "this" problem from what you've said would be too much fuel on the main jet circuit. Engine runs flat at full throttle but would have a huge power band, right?
__________________
2018 Hawk P&P Decked .040 off the head. 17/43 D.I.D. 428, NGK Iridium plug, DeCat, Wrapped pipe, Custom S.S. Muffler core, Nibbi PE30 115/35, L.E.D. Lights, Digital Cluster, USB port, Cutting Bord skid plate, Oil cooler w/ custom CRF oil filter inline, 5Wt fork oil, Rear Shock, CNC Back Rack, 30mm FAT bars, Bark Busters, ProGrips, Adjustable levers, Shinko 700’s lots of Loctite! |
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#10 |
Join Date: Jul 2018
Location: NEPA
Posts: 273
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Also I installed an in line fuel filter, nice one too. It wrecked the fuel flow and made the engine run like trash at full throttle. Bought a cheep looking filter and it's perfect
![]() Just an idea, sorry, kinda hard to fix by message, there's good people here, you'll get it !
__________________
2018 Hawk P&P Decked .040 off the head. 17/43 D.I.D. 428, NGK Iridium plug, DeCat, Wrapped pipe, Custom S.S. Muffler core, Nibbi PE30 115/35, L.E.D. Lights, Digital Cluster, USB port, Cutting Bord skid plate, Oil cooler w/ custom CRF oil filter inline, 5Wt fork oil, Rear Shock, CNC Back Rack, 30mm FAT bars, Bark Busters, ProGrips, Adjustable levers, Shinko 700’s lots of Loctite! |
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#11 |
Join Date: Jan 2012
Location: ChCh , NZ
Posts: 2,265
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When you say full throttle...
is this full throttle as in the twist grip or full throttle as in max revs.. ...
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#12 |
Join Date: Nov 2017
Location: Suffolk Va.
Posts: 146
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if this was a problem on my Roketa I would look at fuel flow... also carburetor problems... staving for fuel... an ignition problem will be a problem through out the rpm's... but a fuel problem wot would probably be low fuel in the bowel and star staving for fuel... check your float settings...
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Tags |
magician, power, problem, valve |
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