Track day, Race starts and a funny bike?

5evenz · June 26th, 2013, 05:05 PM

Alright so i attended the West Coast Super Bike School with the WMRC at mission raceway and had an awesome time with a lot of great riders and bikes.

My issue is that after a day of racing and about 10 practice race starts (with cool down time in between) I was heading home on the highway and at about 120km/h in sixth the bike would not accelerate or increase in rpm. (stuck at about 9.5 - 10k rpm. When i roll on the gas it would stick at about 9500 rpm and every second or so give a little jump or jolt for a sec and speed up. Maybe the clutch? the bike is at 10 000 km.

Anyone know whats up? I'm about to go out to try and do it again.

thx.

MagicMike · June 26th, 2013, 05:16 PM

Clutch would typically come with increased revs and no increase of speed.

5evenz · June 26th, 2013, 05:38 PM

yeah when stuck at 9500rpm every few moments the speed and rpm would jump then settle back down.

csmith12 · June 26th, 2013, 05:43 PM

If it ran fine before,

Cross your fingers it's on of these
Main jet has some debris lodged in it
Vac line may have come off or leaking
Spark plug loose/wires
Fuel system problem, petcock, filter or line pinched or whatnot

Hope it's not
Valve problem
Hole in piston
Spark plug threads loose
Head gasket issues

5evenz · June 27th, 2013, 12:14 AM

thanks, will go through those things in the morning and replace the air filter. Also have 2 shims in the carbs and will see if i'm running rich..

csmith12 · June 27th, 2013, 04:57 AM

Oh I think you mean a stutter, one shim/returning to stock would be on my list too.

5evenz · June 27th, 2013, 10:48 PM

ALright! pulled it all apart and after removing the shims noticed a quarter sized clip from some luggage straps i had stored in the tail section, LODGED IN THE SNORKEL! pulled em out, cleaned the filter and fired it up for a test drive and everything is mostly hunkydory.
Still going to go through the plugs and sync the carbs. Moral of the story, Careful what you put in your tail!!!!

MagicMike · July 3rd, 2013, 05:27 PM

Awesome, good result

htdub · July 4th, 2013, 01:53 PM

You were the blue 250r pitted behind us I think, have the green/black 250 race and friend has the red 250r race bike

Panda · July 4th, 2013, 07:25 PM

I read a similar story but it was gummy bears lodged in the snorkel.

June 26th, 2013, 05:05 PM	#1
5evenz ninjette.org member Name: Sev Location: Vancouver Join Date: Jul 2011 Motorcycle(s): 09' 250r Thunder Blue Posts: 165	Track day, Race starts and a funny bike? Alright so i attended the West Coast Super Bike School with the WMRC at mission raceway and had an awesome time with a lot of great riders and bikes. My issue is that after a day of racing and about 10 practice race starts (with cool down time in between) I was heading home on the highway and at about 120km/h in sixth the bike would not accelerate or increase in rpm. (stuck at about 9.5 - 10k rpm. When i roll on the gas it would stick at about 9500 rpm and every second or so give a little jump or jolt for a sec and speed up. Maybe the clutch? the bike is at 10 000 km. Anyone know whats up? I'm about to go out to try and do it again. thx.

June 26th, 2013, 05:43 PM	#4
csmith12 The Corner Whisperer Name: Chris (aka Reactor) Location: Northern KY Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much. MOTY 2015, MOTM - Nov '12, Nov '13	If it ran fine before, Cross your fingers it's on of these Main jet has some debris lodged in it Vac line may have come off or leaking Spark plug loose/wires Fuel system problem, petcock, filter or line pinched or whatnot Hope it's not Valve problem Hole in piston Spark plug threads loose Head gasket issues __________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School

June 27th, 2013, 04:57 AM	#6
csmith12 The Corner Whisperer Name: Chris (aka Reactor) Location: Northern KY Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much. MOTY 2015, MOTM - Nov '12, Nov '13	Oh I think you mean a stutter, one shim/returning to stock would be on my list too. __________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School

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June 26th, 2013, 05:16 PM	#2
MagicMike ninjette.org member Name: Michael Location: Brisbane Join Date: Apr 2013 Motorcycle(s): 2012 EX250J Posts: 126	Clutch would typically come with increased revs and no increase of speed.

June 26th, 2013, 05:38 PM	#3
5evenz ninjette.org member Name: Sev Location: Vancouver Join Date: Jul 2011 Motorcycle(s): 09' 250r Thunder Blue Posts: 165	yeah when stuck at 9500rpm every few moments the speed and rpm would jump then settle back down.

June 27th, 2013, 12:14 AM	#5
5evenz ninjette.org member Name: Sev Location: Vancouver Join Date: Jul 2011 Motorcycle(s): 09' 250r Thunder Blue Posts: 165	thanks, will go through those things in the morning and replace the air filter. Also have 2 shims in the carbs and will see if i'm running rich..

June 27th, 2013, 10:48 PM	#7
5evenz ninjette.org member Name: Sev Location: Vancouver Join Date: Jul 2011 Motorcycle(s): 09' 250r Thunder Blue Posts: 165	ALright! pulled it all apart and after removing the shims noticed a quarter sized clip from some luggage straps i had stored in the tail section, LODGED IN THE SNORKEL! pulled em out, cleaned the filter and fired it up for a test drive and everything is mostly hunkydory. Still going to go through the plugs and sync the carbs. Moral of the story, Careful what you put in your tail!!!!

July 3rd, 2013, 05:27 PM	#8
MagicMike ninjette.org member Name: Michael Location: Brisbane Join Date: Apr 2013 Motorcycle(s): 2012 EX250J Posts: 126	Awesome, good result

July 4th, 2013, 01:53 PM	#9
htdub ninjette.org member Name: Hien Location: Vancouver,BC Join Date: Feb 2012 Motorcycle(s): triumph Posts: 116	You were the blue 250r pitted behind us I think, have the green/black 250 race and friend has the red 250r race bike

July 4th, 2013, 07:25 PM	#10
Panda not an actual panda Name: dan Location: philadelphia Join Date: Aug 2012 Motorcycle(s): 2008 Ninja 250, 2009 CBR600RR (Sold) Posts: A lot.	I read a similar story but it was gummy bears lodged in the snorkel.