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Bike Problems
started by Dekk
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August 13th 2010 at 9:56 AM
[ Modified August 13th 2010 at 10:03 AM
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Dekk
Above Average Member
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665 Posts 
Group: Members
Member Since: June 18th 2008
Location: Hawarden, Iowa, USA
Current Dirtbike: Kawasaki KX250F
Race Number: 25
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Ok, my friend has a 2000 CR125R. There is no power to the wheels. We replaced the clutch and springs and it wasn't the problem. It still shifts through all 5 gears as well. Before it happend he said it seemed as if his chain was hoping over his sprockets, which is impossible cause it has brand new sprockets and chain. So any ideas???
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August 14th 2010 at 12:13 AM
[ Modified August 14th 2010 at 12:16 AM
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MX86
What's this button do?
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757 Posts 
Group: Moderators
Member Since: June 5th 2008
Location: Nashwauk, MN, USA
Current Dirtbike: 2006 Yamaha yz250
Race Number: 86
Sponsors: X-Brand, Gravity Worx
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Put it on a stand and fire it up and shift through the gears to make sure the tire spins without load. 
I think you may have broke the primary drive gear, it's a long shot, but would explain it and the (sound of the hopping chain)
Living Life 1 berm at a time.
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August 15th 2010 at 10:20 PM
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MX86
What's this button do?
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757 Posts
Group: Moderators
Member Since: June 5th 2008
Location: Nashwauk, MN, USA
Current Dirtbike: 2006 Yamaha yz250
Race Number: 86
Sponsors: X-Brand, Gravity Worx
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any news?
Living Life 1 berm at a time.
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August 16th 2010 at 7:17 PM
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Dekk
Above Average Member
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665 Posts
Group: Members
Member Since: June 18th 2008
Location: Hawarden, Iowa, USA
Current Dirtbike: Kawasaki KX250F
Race Number: 25
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hes just gonna trade it off
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August 22nd 2010 at 9:28 PM
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rmz-rider
Starting Member
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20 Posts
Group: Members
Member Since: January 26th 2010
Location: Ontario, Canada
Current Dirtbike: 05 kxf 250
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Quote originally posted by MX86
Put it on a stand and fire it up and shift through the gears to make sure the tire spins without load.
I think you may have broke the primary drive gear, it's a long shot, but would explain it and the (sound of the hopping chain)
thats whats happening to my bike accept for only in second gear!
would it be the same problem do you guys think?
SOLD 2005 kx 250f.
- pro circuit ti-4 full exhaust
- pro circuit water pump system
- hinson clutch
wishing i could buy a new bike!
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August 23rd 2010 at 8:16 AM
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Kawi_Rider_316
Team Not Even Scared
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632 Posts
Group: Members
Member Since: July 11th 2008
Location: Ocheyedan, Ia, USA
Current Dirtbike: Kx 250F
Race Number: 316
Sponsors: Spencer Motorsports
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I think mx knows alot more about the transmission than me. It sounds like to me just your 2nd gear is out weather its stripped or what i wouldnt know, where suzi's problem the primary gear is the problem hence why your bikes fine in other gears except 2nd and suzi's is in all gears. hopefully mx gets on sometime soon here and can be more help
"Jump for show, Corner for dough"
"In ball and stick sports they give you the balls, In Motocross you have to bring your own"
Sponsors:
Glens Sport Center, FC MODS, MSR, Sunline, Tag, Filtron, Six Six One, Steel Mx, Dunlop,
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August 23rd 2010 at 11:58 AM
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MX86
What's this button do?
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757 Posts
Group: Moderators
Member Since: June 5th 2008
Location: Nashwauk, MN, USA
Current Dirtbike: 2006 Yamaha yz250
Race Number: 86
Sponsors: X-Brand, Gravity Worx
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My first diagnosis to check would be to measure the thickness of the 2nd gear clutch and pressure plate to make sure they are within tolerance (usually the whole clutch slips with this tho).
Second gear is common among race bikes (since most start in second for starts) so my guess would be a stripped 2nd gear dog. Does it skip when under load in 2nd or just not move at all?
Living Life 1 berm at a time.
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August 25th 2010 at 3:37 PM
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rmz-rider
Starting Member
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20 Posts
Group: Members
Member Since: January 26th 2010
Location: Ontario, Canada
Current Dirtbike: 05 kxf 250
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Quote originally posted by MX86
My first diagnosis to check would be to measure the thickness of the 2nd gear clutch and pressure plate to make sure they are within tolerance (usually the whole clutch slips with this tho).
Second gear is common among race bikes (since most start in second for starts) so my guess would be a stripped 2nd gear dog. Does it skip when under load in 2nd or just not move at all?
it skips and barely moves, its almost like a wratcheting sound?
SOLD 2005 kx 250f.
- pro circuit ti-4 full exhaust
- pro circuit water pump system
- hinson clutch
wishing i could buy a new bike!
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August 25th 2010 at 3:52 PM
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Kawi_Rider_316
Team Not Even Scared
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632 Posts
Group: Members
Member Since: July 11th 2008
Location: Ocheyedan, Ia, USA
Current Dirtbike: Kx 250F
Race Number: 316
Sponsors: Spencer Motorsports
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Im guessin 2nd is stripped. Have you drained your oil? Alot of metal shavings?
"Jump for show, Corner for dough"
"In ball and stick sports they give you the balls, In Motocross you have to bring your own"
Sponsors:
Glens Sport Center, FC MODS, MSR, Sunline, Tag, Filtron, Six Six One, Steel Mx, Dunlop,
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August 30th 2010 at 10:48 PM
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Dekk
Above Average Member
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665 Posts
Group: Members
Member Since: June 18th 2008
Location: Hawarden, Iowa, USA
Current Dirtbike: Kawasaki KX250F
Race Number: 25
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Ok, I feel like a total idiot for not even thinking of this. A few days before it happended he put on new sprockets. Well turns out he didn't have the front sprocket bolt tight and it striped out the splines inside the new sprocket. Never would have even thought of that happening. The shaft splines are still good so we put on the old sprocket and it
worked perfectly
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August 31st 2010 at 9:45 AM
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Kawi_Rider_316
Team Not Even Scared
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632 Posts
Group: Members
Member Since: July 11th 2008
Location: Ocheyedan, Ia, USA
Current Dirtbike: Kx 250F
Race Number: 316
Sponsors: Spencer Motorsports
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Way to go dekk! Except we never thought of that either ha ha. Oh well at least its fixed and your not splittin the cases,
"Jump for show, Corner for dough"
"In ball and stick sports they give you the balls, In Motocross you have to bring your own"
Sponsors:
Glens Sport Center, FC MODS, MSR, Sunline, Tag, Filtron, Six Six One, Steel Mx, Dunlop,
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August 31st 2010 at 10:27 AM
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edmonster
to fat to 50 but doing it anyways!
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196 Posts 
Group: Members
Member Since: June 22nd 2008
Location: Ely, MN
Current Dirtbike: custom pitbike
Race Number: not needed
Sponsors: dont need any
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lucky you didnt mess up the splines on the counter shaft... i had that happen to me on my 200x. definately not a fun time tearing an entire motor apart and re assembling. lol
50cc's of mayhem
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September 1st 2010 at 8:55 PM
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Dekk
Above Average Member
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665 Posts
Group: Members
Member Since: June 18th 2008
Location: Hawarden, Iowa, USA
Current Dirtbike: Kawasaki KX250F
Race Number: 25
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Well it wasn't my bike lol. But ya the shaft is alright yet, it had a little bit of wear but I think its gonna be ok
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