Shudder on takeoff

newbie555 · 01-16-2008, 09:08 PM

It seems my bike has developed a shudder on takeoff. When I go from a stop and let the clutch go slowly it takes off and then kinda jerks and goes smoothly from there on out. All other clutch operation is ok, but just the takeoffs, the sprocket is good and tight, and the chain is within spec

Do I need stronger clutch springs, adjustment?

ejcycles · 01-16-2008, 09:12 PM

Hi newbie555

What make & model bike?

newbie555 · 01-16-2008, 09:16 PM

Newstar DB-200

ejcycles · 01-16-2008, 09:20 PM

How much free play do you have in the clutch handle? Where the clutch lever hits the mount/perch there should be between 1/8" to 1/4" free play depending on how you like the clutch to release.

newbie555 · 01-16-2008, 09:23 PM

you mean free play where I Should be able to pull without it engaging the clutch?

ejcycles · 01-16-2008, 09:26 PM

Yes, exactly.

newbie555 · 01-16-2008, 09:30 PM

no i dont. But i think if i allowed that much play, it wouldnt engage the clutch fully when pulled in as I had to get an aftermarket handle that doesnt allow as much pulling back

ejcycles · 01-16-2008, 09:33 PM

Is there an adjustement area on the cable, at the mount for the cable at the engine?

red2003 · 01-17-2008, 10:14 AM

Check your rear sprocket bolts (14mm). I bet you will find some or all of them are loose. This makes EXACTLY the feeling you are describing.

newbie555 · 01-17-2008, 11:54 AM

there is an adjustment on the cable. No, the sprocket bolts are absolutely tight. I just fixed that

frostbite · 01-17-2008, 01:14 PM

Perhaps the swingarm bolt? A few members have had issues with broken swingarm bolts and/or lack of grease on the swingarm pivot shaft.

AZ200cc · 01-17-2008, 01:35 PM

Is it the clutch or is the motor maybe stumbling? Just throwing it out there as an option.

newbie555 · 01-17-2008, 07:45 PM

the swingarm bolt is fine. And it isnt the motor.

AZ200cc · 01-17-2008, 07:52 PM

I wonder what kind of oil it has in it, Might have one that is giving the wet clutch problems.

newbie555 · 01-17-2008, 09:39 PM

the clutch doesnt slip at all though. it is castrol 10-30 motorcyle oil

01-16-2008, 09:08 PM	#1
newbie555 Join Date: May 2007 Posts: 172	Shudder on takeoff It seems my bike has developed a shudder on takeoff. When I go from a stop and let the clutch go slowly it takes off and then kinda jerks and goes smoothly from there on out. All other clutch operation is ok, but just the takeoffs, the sprocket is good and tight, and the chain is within spec Do I need stronger clutch springs, adjustment?
	0

01-16-2008, 09:12 PM	#2
ejcycles Join Date: Oct 2006 Location: 11481 State Route 44 Mantua, Ohio 44255 Posts: 1,112	Hi newbie555 What make & model bike? __________________ Thanks, Bruce @ Endless Journey Cycles "Phone Calls Only" ~330-274-0098~ Hours: Tue.-Fri. 10:00-6:00 Sat. 10:00-4:00 EST. Dealer for: Lifan, Crossrunner ATVs. http://www.endlessjourneycycles.net
	0

01-16-2008, 09:20 PM	#4
ejcycles Join Date: Oct 2006 Location: 11481 State Route 44 Mantua, Ohio 44255 Posts: 1,112	How much free play do you have in the clutch handle? Where the clutch lever hits the mount/perch there should be between 1/8" to 1/4" free play depending on how you like the clutch to release. __________________ Thanks, Bruce @ Endless Journey Cycles "Phone Calls Only" ~330-274-0098~ Hours: Tue.-Fri. 10:00-6:00 Sat. 10:00-4:00 EST. Dealer for: Lifan, Crossrunner ATVs. http://www.endlessjourneycycles.net
	0

01-16-2008, 09:26 PM	#6
ejcycles Join Date: Oct 2006 Location: 11481 State Route 44 Mantua, Ohio 44255 Posts: 1,112	Yes, exactly. __________________ Thanks, Bruce @ Endless Journey Cycles "Phone Calls Only" ~330-274-0098~ Hours: Tue.-Fri. 10:00-6:00 Sat. 10:00-4:00 EST. Dealer for: Lifan, Crossrunner ATVs. http://www.endlessjourneycycles.net
	0

01-16-2008, 09:33 PM	#8
ejcycles Join Date: Oct 2006 Location: 11481 State Route 44 Mantua, Ohio 44255 Posts: 1,112	Is there an adjustement area on the cable, at the mount for the cable at the engine? __________________ Thanks, Bruce @ Endless Journey Cycles "Phone Calls Only" ~330-274-0098~ Hours: Tue.-Fri. 10:00-6:00 Sat. 10:00-4:00 EST. Dealer for: Lifan, Crossrunner ATVs. http://www.endlessjourneycycles.net
	0

01-16-2008, 09:16 PM	#3
newbie555 Join Date: May 2007 Posts: 172	Newstar DB-200
	0

01-16-2008, 09:23 PM	#5
newbie555 Join Date: May 2007 Posts: 172	you mean free play where I Should be able to pull without it engaging the clutch?
	0

01-16-2008, 09:30 PM	#7
newbie555 Join Date: May 2007 Posts: 172	no i dont. But i think if i allowed that much play, it wouldnt engage the clutch fully when pulled in as I had to get an aftermarket handle that doesnt allow as much pulling back
	0

01-17-2008, 10:14 AM	#9
red2003 Join Date: Jan 2007 Location: Northern Vermont, USA Posts: 1,240	Check your rear sprocket bolts (14mm). I bet you will find some or all of them are loose. This makes EXACTLY the feeling you are describing. __________________ First Chinabike: 2006 Roketa RSX200E Current Chinabikes: 2023 Titan DLX & 2022 Lifan KP Mini w/ 210cc BRT kit, 22 RWHP!
	0

01-17-2008, 11:54 AM	#10
newbie555 Join Date: May 2007 Posts: 172	there is an adjustment on the cable. No, the sprocket bolts are absolutely tight. I just fixed that
	0

01-17-2008, 01:14 PM	#11
frostbite Join Date: May 2006 Location: Fredericton, NB, Canada Posts: 1,744	Perhaps the swingarm bolt? A few members have had issues with broken swingarm bolts and/or lack of grease on the swingarm pivot shaft. __________________ Frostbite "The beatings will continue until moral improves"
	0

01-17-2008, 01:35 PM	#12
AZ200cc Join Date: Apr 2007 Location: Show Low Arizona Posts: 2,889	Is it the clutch or is the motor maybe stumbling? Just throwing it out there as an option. __________________ <br />2001 Suzuki DR200SE<br />1997 Suzuki RM250 YIKES<br />1995 Yamaha Breeze 125 daughters<br />1991 Honda XR80r Restored<br />maybe a 2003 Yamaha TTR90
	0

01-17-2008, 07:45 PM	#13
newbie555 Join Date: May 2007 Posts: 172	the swingarm bolt is fine. And it isnt the motor.
	0

01-17-2008, 07:52 PM	#14
AZ200cc Join Date: Apr 2007 Location: Show Low Arizona Posts: 2,889	I wonder what kind of oil it has in it, Might have one that is giving the wet clutch problems. __________________ <br />2001 Suzuki DR200SE<br />1997 Suzuki RM250 YIKES<br />1995 Yamaha Breeze 125 daughters<br />1991 Honda XR80r Restored<br />maybe a 2003 Yamaha TTR90
	0

01-17-2008, 09:39 PM	#15
newbie555 Join Date: May 2007 Posts: 172	the clutch doesnt slip at all though. it is castrol 10-30 motorcyle oil
	0