BULL 150 clunking in reverse

MI_TAO_RIDER · 09-15-2019, 11:21 AM

I just bought a brand new bull 150. I got it assembled and it clunks when getting started in reverse. I also think it requires to much throttle to get moving in forward as well as reverse. I bought this for my wife for her birthday and am a little disappointed that brand new it clunks. I checked the oil is full. The sprocket teeth are not bent and the chain is in great shape. I am thinking it is something with the CVT, but know absolutely nothing about this type of transmission. Any information for what to look for/at would be great!

FLASHLIGHTBOY · 09-16-2019, 05:49 PM

if the chain is too tight it will try to jump the teeth... where do you hear or feel the clunk?? in the belt drive or chain... you need to tell more.... not wizards here...

MI_TAO_RIDER · 09-17-2019, 06:27 AM

My wife had the idea to just run it in forward for a bit and see if it breaks itself in. Reverse is great now. Admittedly it only make the clunk twice and it was at very low speed.... Like 1-2 mph. Thank you for your reply flash light

Paul2 · 09-17-2019, 11:22 AM

I have 2 of them, never any clunking on mine...keep a eye and ear out.

**JerryHawk250** · 09-17-2019, 11:27 AM

Check rear wheel, chain and sprocket alignment. The clunk you probably hear is the sprocket tooth grabbing the chain from misalignment.

FLASHLIGHTBOY · 09-17-2019, 02:07 PM

thanks MI TAO RIDER for the reply... hope you enjoy your ride... lots of help on youtube or just check in here... please check over the nuts and bolts after a couple of rides... check you chain adjustment use the good gas and ride...

Deckard_Cain · 09-18-2019, 10:06 AM

Also consider too, that with a CVT the engine will need to rev up to the clutch engagement speed before it grabs and reverse engages. On my generic gy6 cvt atv with planetary reverse, you have to go easy on the throttle when backing up. If you rev it too fast, she'll clunk and slam hard as the clutch engages and reverse gears mesh in.

09-15-2019, 11:21 AM	#1
MI_TAO_RIDER Join Date: Sep 2019 Posts: 7	BULL 150 clunking in reverse I just bought a brand new bull 150. I got it assembled and it clunks when getting started in reverse. I also think it requires to much throttle to get moving in forward as well as reverse. I bought this for my wife for her birthday and am a little disappointed that brand new it clunks. I checked the oil is full. The sprocket teeth are not bent and the chain is in great shape. I am thinking it is something with the CVT, but know absolutely nothing about this type of transmission. Any information for what to look for/at would be great!
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09-16-2019, 05:49 PM	#2
FLASHLIGHTBOY Join Date: May 2009 Location: SASKATOON Posts: 1,161	chain adjustment if the chain is too tight it will try to jump the teeth... where do you hear or feel the clunk?? in the belt drive or chain... you need to tell more.... not wizards here... __________________ DEALER FOR ZSTAR & GIO PRODUCTS, TAOTAO ABIBABA ATV ETC
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09-17-2019, 06:27 AM	#3
MI_TAO_RIDER Join Date: Sep 2019 Posts: 7	It was my fault My wife had the idea to just run it in forward for a bit and see if it breaks itself in. Reverse is great now. Admittedly it only make the clunk twice and it was at very low speed.... Like 1-2 mph. Thank you for your reply flash light
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09-17-2019, 11:27 AM	#5
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,555	Check rear wheel, chain and sprocket alignment. The clunk you probably hear is the sprocket tooth grabbing the chain from misalignment. __________________ 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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09-17-2019, 02:07 PM	#6
FLASHLIGHTBOY Join Date: May 2009 Location: SASKATOON Posts: 1,161	thanks thanks MI TAO RIDER for the reply... hope you enjoy your ride... lots of help on youtube or just check in here... please check over the nuts and bolts after a couple of rides... check you chain adjustment use the good gas and ride... __________________ DEALER FOR ZSTAR & GIO PRODUCTS, TAOTAO ABIBABA ATV ETC
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09-17-2019, 11:22 AM	#4
Paul2 Join Date: Jun 2017 Posts: 81	I have 2 of them, never any clunking on mine...keep a eye and ear out.
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09-18-2019, 10:06 AM	#7
Deckard_Cain Join Date: Aug 2019 Location: Bay City, MI Posts: 397	Also consider too, that with a CVT the engine will need to rev up to the clutch engagement speed before it grabs and reverse engages. On my generic gy6 cvt atv with planetary reverse, you have to go easy on the throttle when backing up. If you rev it too fast, she'll clunk and slam hard as the clutch engages and reverse gears mesh in.
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