Bike not making top speed. - SV650.org

02-09-05, 05:49 PM

OK heres a weird one ... I noticed this while I was in Germany, that my bike wouldn't go all the way to top speed. This is the first time i've not been able to reach top.

before heading to germany I put in a K&N filter but dont think this is the problem as I know I hit 130 with it in before Germany.

However I did need to play with my fuel mixture the day before heading to Germany, and I have a bad feeling that a piece of plastic fell off into my front cylinder.

After speaking to a mate of mine we came to the conclusion that this bit of plastic could more than likely be blocking the valve or keeping it held open slightly.

Now the question is, what could I do to clear this blockage, if this is infact the problem (certainly makes sense that this is the problem.) If not what else could be causing this?

02-09-05, 06:32 PM

well hello there. i reckon that if the peice of plastic is blocking the vavle, then your engine wont run at all on the front and so itll stall your bike. if its keeping it open a bit and not letting it close properly, itll stop the cams going properly and will either stall your bike again or damage your valves. i think youll need to do a little bit of engine taking apart to fix it. or you could remove the airbox completely and you might be able to get a pait of tweasers in to pull the plastic out depending on where it is. worth a try

TRICK

03-09-05, 11:48 AM

a bit of plastic? it would be incinerated in a jiffy and wont be there for sure..........

03-09-05, 11:51 AM

Yeha it thought it may have been completely destroyed

Im gonna have to take a closer look once I've got the engine out of the frame. Gonna need to do a few bits to the engine anyway, so will be worth a shot.

Spanner Man · 03-09-05, 03:12 PM

Afetrnoon.
Anything going into the cylinder would damage the valves for sure, It's more likely that it is stuck in the inlet tract therefore restricting the airflow.

Cheers

03-09-05, 07:54 PM

Having run a bike on one cylinder before. It will reach a max of about 90mph and the time that it takes to get there is quiet substantial.

02-09-05, 05:49 PM	#1
sprocket Guest Posts: n/a	Bike not making top speed. OK heres a weird one ... I noticed this while I was in Germany, that my bike wouldn't go all the way to top speed. This is the first time i've not been able to reach top. before heading to germany I put in a K&N filter but dont think this is the problem as I know I hit 130 with it in before Germany. However I did need to play with my fuel mixture the day before heading to Germany, and I have a bad feeling that a piece of plastic fell off into my front cylinder. After speaking to a mate of mine we came to the conclusion that this bit of plastic could more than likely be blocking the valve or keeping it held open slightly. Now the question is, what could I do to clear this blockage, if this is infact the problem (certainly makes sense that this is the problem.) If not what else could be causing this?

03-09-05, 03:12 PM	#5
Spanner Man Member Mega Poster Join Date: May 2005 Location: Sunbury Middlesex Posts: 1,396	Afetrnoon. Anything going into the cylinder would damage the valves for sure, It's more likely that it is stuck in the inlet tract therefore restricting the airflow. Cheers __________________ Spanner Man http://stewarts-motorcycles.co.uk/default.html

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02-09-05, 06:32 PM	#2
trick Guest Posts: n/a	well hello there. i reckon that if the peice of plastic is blocking the vavle, then your engine wont run at all on the front and so itll stall your bike. if its keeping it open a bit and not letting it close properly, itll stop the cams going properly and will either stall your bike again or damage your valves. i think youll need to do a little bit of engine taking apart to fix it. or you could remove the airbox completely and you might be able to get a pait of tweasers in to pull the plastic out depending on where it is. worth a try TRICK

03-09-05, 11:48 AM	#3
skidmarx Guest Posts: n/a	a bit of plastic? it would be incinerated in a jiffy and wont be there for sure..........

03-09-05, 11:51 AM	#4
sprocket Guest Posts: n/a	Yeha it thought it may have been completely destroyed Im gonna have to take a closer look once I've got the engine out of the frame. Gonna need to do a few bits to the engine anyway, so will be worth a shot.

03-09-05, 07:54 PM	#6
Stig Guest Posts: n/a	Having run a bike on one cylinder before. It will reach a max of about 90mph and the time that it takes to get there is quiet substantial.