My 03 R1 is down on power as well...and I have no clue as to why...

search for my thread ......

I've since fixed some of the supposed probs, but have yet to hit the dyno.

 

yep sometiing wrong. start with simple stuff. cahrge battery fully, fresh gas, new plugs, clean air filter...if it still runs smooth just with power loss, could be many things.. compression and leakdown after you do other things..or while u have plugs out.

 

This is an R6 right???? 107 at the rear wheel is not down 30HP? I'm confused for an R1 that sucks for an R6 that is probably right.

 

He said R1... you are confused.

 

107 is on for a r6. plus u are at a higher elevation.

 

He said R1...... :no

 

Sounds like a European restricted one to me.... As that's what mine produced when still restricted.

 

It's an 03 r1, not the r6. It's in South Carolina. I doubt it's European. It would probably have something different it was from there.

I just thought about this.....

I only get about 120mi before a fuel light and it never starts the first time I crank it. It takes minute to get it to start. Could that be from lack of spark or from lack of fuel? Should I use some sort of injector cleaner? It may have sat for a while.

 

120 miles for fuel light about normal.. but sounds like it needs some attn somewhere.

 

I'm having the excect same problems with my UK 2002 R1, i'm getting 118BHp at the back wheel, the bike has 8k miles on the clocks, just done full service (oil, filters, iridium spark plugs) The only mod on the bike is an Akrapovic carbon slip on exhaust.. other info from the dyno: AirP(in.Hg) 29.28 AirT(F) 70.6 Maximum Rates 118.4Hp@10364rpm/67ft-ibs@8423rpm...

 

check the airbox....I had mice 2 winters ago...and it ran ok but they made a home in front of the air filter. I have the airbox mod

 

Get a power commander and a after market exhaust.

 

fuel pump....my k2 gsxr 750 which was tuned to 127 rwhp made 99hp when my fuel pressure was 7psi too low....swapped fuel pumps gained back 20hp

 

fuel pump....my k2 gsxr 750 which was tuned to 127 rwhp made 99hp when my fuel pressure was 7psi too low....swapped fuel pumps gained back 20hp

Damn....I may give that a try if I dyno poorly again. The bike feels stronger with the exup tuned though. We'll see.

 

its a fairly common problem if it sits awhile or has really high mileage take it to a dealer and performa fuel system pressure test better than a dealer try a dyno shop generally fuel pressure reads perfect at idle put a load under the engine and if it drops off this will kill your power...i could but a gsxr750 to the throttle stop in 1st gear, that bike should of flipped over backwards, it just got light in the front; on the suzuki's the nickle plating in the fuel pump itself flakes off and clogs the uncleanable fuel screen when they get up there in mileage...some of them anyways..... if you got some bad gas or rust, debris in the tank ect it could do the same thing, remember you cannot just replace a fuel filter it has to be the pump...its not that expensive to get it dyno'd and get a fuel pressure test worse comes to worse swap tanks with a friend and dyno it...

 

its a fairly common problem if it sits awhile or has really high mileage take it to a dealer and performa fuel system pressure test better than a dealer try a dyno shop generally fuel pressure reads perfect at idle put a load under the engine and if it drops off this will kill your power...i could but a gsxr750 to the throttle stop in 1st gear, that bike should of flipped over backwards, it just got light in the front; on the suzuki's the nickle plating in the fuel pump itself flakes off and clogs the uncleanable fuel screen when they get up there in mileage...some of them anyways..... if you got some bad gas or rust, debris in the tank ect it could do the same thing, remember you cannot just replace a fuel filter it has to be the pump...its not that expensive to get it dyno'd and get a fuel pressure test worse comes to worse swap tanks with a friend and dyno it...

Good advice, I'll give it a shot.

The only bad thing is that none of my friends ride Yamaha R1's, a few 6's, but my bike is rare in Columbia, SC.

 

before randomly swapping parts in hopes of hitting the correct thing, find out what the problem is first. Other wise you are just wasting time and money.

What was the a/f like on the dyno?

Could be a million different things, finding the problem and fixing it will ultimatly be cheaper than swapping out random parts hpoing it fixes it's self.

I would check the compression, and most certainly the cam timing.

 

Here's the dyno sheet!

 

and another

 

thats a rough looking dyno sheet something is way off...
you are a little low but smooth off the bottom then all over the place

 

i wow that sucks sorry man, wish i could help ya out but hope ya get that thing fixed

 

it would be very useful in your trouble shooting if you could get a dyno run with an A/F graph on it.

Compression test and go from there.

 

loosing power in its 20ft long chain