lower performance in gears

legsroses

Supercharged

Joined

Mar 6, 2012

Messages

213

• Dec 13, 2016

• #1

Hi,
my 2010 bike reached lower speed than standard.. not 50mph but 40 (1gear), not 87mph but 63 (2gear), not 106mph but 84mph (3gear).. for dealer is all ok, diagnostic is ok too.. so I don't know as solve it, someone can suggest something about..
Thanks

 

steve59

Nitrous

Joined

Jun 26, 2013

Messages

1,066

Location

carol stream il

Ride

2016 KTM 1290 SDR SE. 2012 K1600 GTL Schwinn S-30

• Dec 13, 2016

• #2

is the engine reaching redline?

 

roame

.020 Over

Joined

Dec 25, 2009

Messages

32

Location

Clinton, MS.

Ride

2016 Roadster

• Dec 13, 2016

• #3

any chance your clutch is slipping?

 

legsroses

Supercharged

Joined

Mar 6, 2012

Messages

213

• Dec 13, 2016

• #4

steve59 said:

is the engine reaching redline?

Click to expand...

I perceive physical sensation, like when it reach redline.. moreover I feel roar sound like so..
it seems however begin before when it should do..
I think but, effectively, I'm not sure.. so because I don't use, since 2011, any tachometer..
which stock odometer-rev counter wires

 

legsroses

Supercharged

Joined

Mar 6, 2012

Messages

213

• Dec 13, 2016

• #5

roame said:

any chance your clutch is slipping?

Click to expand...

I'm enough sure it isn't so

 

Jag

Living Legend

Joined

Oct 7, 2013

Messages

3,935

Location

Cape May Co. NJ

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2013 R3T

• Dec 13, 2016

• #6

Clogged fuel filter?? Would be my guess.

 

legsroses

Supercharged

Joined

Mar 6, 2012

Messages

213

• Dec 13, 2016

• #7

Jag said:

Clogged fuel filter?? Would be my guess.

Click to expand...

I'm pretty sure it isn't.. fuel pump, as other things nearby to it, it's ok

 

rocketjohn

Top Fuel

Joined

May 28, 2016

Messages

1,939

Location

Roanoke, VA

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was a 2013 Triumph Rocket 3 Touring

• Dec 13, 2016

• #8

If the engine is good condition overall, there remain only three things.....air, fuel, spark. Among these you may need a clean air filter, a new fuel filter, and/or new spark plugs. Or you may need all three.

 

R-III-R Turbo

Mine is the biggest :)

Joined

Oct 12, 2010

Messages

2,461

Location

Ireland

Ride

2472cc Supercharged Carpenter Rocket III Stroker

• Dec 14, 2016

• #9

The speeds you report all come in at 5500rpm.
That's pretty accurate point to reach top speed per gear, so that sounds like you are hitting a limiter.

Are you getting these speed readings from the speedometer or a GPS device?
What specification rear tyre are you running?

Assuming speedo readings; given your bike's modifications I would point first at the accuracy of the speedo. You can use an app on your phone to get accurate speed, and verify speedometer circuit accuracy.

After that - have you got tuneboy or tune ecu?
Hook it up and see what your rev limit is set to.
And while you're there, check speedo calibration adjustment (assuming you read your speeds from the speedo and not a GPS)

Also on my 2010 Roadster 6500rpm in 2nd is about 80mph, not 87. The other 2 speeds you give correspond however.

 

Last edited: Dec 14, 2016

legsroses

Supercharged

Joined

Mar 6, 2012

Messages

213

• Dec 14, 2016

• #10

rocketjohn said:

If the engine is good condition overall, there remain only three things.....air, fuel, spark. Among these you may need a clean air filter, a new fuel filter, and/or new spark plugs. Or you may need all three.

Click to expand...

engine ok, except this.. this July I bought new spark plugs, since then I did few miles moreover.. I use washable K&N, I removed bearclaw and airbox too, with other filter and one sensor too.. K&N Rubber Base Filter for Air Temp Sensor | Flipmeisters Specialty Products K&N Rubber Base Crankcase/Vent Filter Replacement | Flipmeisters Specialty Products fuel filter instead it's always the same