DreamNofR1 Posted April 4, 2015 Report Share Posted April 4, 2015 Hey guys. Question here...I've got a 2007 R1 with a GYTR high flow air filter, Leo Vince slip-ons with a Y pipe that eliminates the cat. PC V. Just had her dyno tuned yesterday and it's way low...137 horse to the wheel. That's about 20 hp lower than others I've seen dynoed with the same or fewer mods. She's got about 11k miles and I've never had any issues at all. Seems to run just fine. Any idea why in the world this might be happening? I've searched around and can't find any issues or recalls anyone had with this year and motor. Anybody out there might know of anything? And yes, I realize it could probably be a number of issues without cracking the motor open but I'm far from being a mechanic and wouldn't have any idea what I'm doing...so I thought I'd ask if anyone might know a thing or two about these motors. Any help/suggestions would be appreciated! Quote Link to comment Share on other sites More sharing options...
Gixxus Christ! Posted April 4, 2015 Report Share Posted April 4, 2015 Tall to dtmbrian. Owner of dyno tune motorsports. Quote Link to comment Share on other sites More sharing options...
DreamNofR1 Posted April 4, 2015 Author Report Share Posted April 4, 2015 That's who I had tune it yesterday. Great guy and was very helpful....but had no idea "why the bike wouldn't make power" in his words. Quote Link to comment Share on other sites More sharing options...
Trackbikez Posted April 4, 2015 Report Share Posted April 4, 2015 Without knowing any other symptoms... you may want to check/change the spark plugs. Relatively cheap and easy to do, along with being pretty important to making consistent power. The only other thing that comes to mind is making sure you have known "good" fuel. Quote Link to comment Share on other sites More sharing options...
DreamNofR1 Posted April 4, 2015 Author Report Share Posted April 4, 2015 Which I definitely need to change...I have the originals in there. Probably will top off with Shell gas next time. But, I figured that might make room for 1-3 hp....not 20. Might just have to take it to the Pony. They suggested a compression and leak down test. Quote Link to comment Share on other sites More sharing options...
Bubba Posted April 4, 2015 Report Share Posted April 4, 2015 (edited) To be fair, 137 HP at the wheel means about 154-158 HP at the crank, which isn't that different from the OEM rating of 156.5 HP when new (http://images.motorcycle-usa.com/PhotoGallerys/07yam_comp.jpg). My take is that nearly 140 RWHP is a metric shit-ton more power than most ordinary riders need or can handle on the street. OK….If you ride like Jorge Lorenzo or one of the Hayden brothers, you're prolly looking for more. You've stated that the bike runs flawlessly; it's an 8 year old bike with 11K on the clock and the original spark plugs. Change 'em out and enjoy the ride. You can spend mega bucks looking for the last few HP from a basically stock engine. It prolly wouldnt hurt to check the valve clearances in case they're tight, since that'll rob your power and also end up burning your valves, but it was also prolly a waste of time and money to do a dyno tune on a bike with old plugs, stale gas and an unknown state of maintenance/valve lash. If your skills are to the point you can USE 165+ HP on the street--or for that matter, on the track--sell your R1 and buy something newer and lighter. It'll be cheaper in the long run, IMHO... Edited April 4, 2015 by Bubba Quote Link to comment Share on other sites More sharing options...
oldschoolsdime92 Posted April 4, 2015 Report Share Posted April 4, 2015 (edited) Edit- post deleted. Reading comprehension fail on my part. Edited April 4, 2015 by oldschoolsdime92 Quote Link to comment Share on other sites More sharing options...
TwiztedRabbit Posted April 4, 2015 Report Share Posted April 4, 2015 he's not asking if he needs the power.. hes asking why his bike isn't making the power it should make.. don't confuse your thoughts for reading comprehensionas far as not being far off.. your incorrect.. 156 brand new at the wheel and 137 is 20hp difference .. that's massive.. its not an age thing as my wifes made the same hp with 17k on it and 7 year old with nothing but hard ridden track miles.. as it did when new.. so obviously something is off.. Quote Link to comment Share on other sites More sharing options...
TwiztedRabbit Posted April 4, 2015 Report Share Posted April 4, 2015 I agree with starting with the basics.. you've said before it needs the basics tuned up.. check the air filter check the plugs..... if its running flawlessly its not likely to be the gas.. the bike would spudder and buck under shit old fuel normally... compression could be an issue.. but I'm personally one not to crack a motor unless it needs it.. though it might be needed. Quote Link to comment Share on other sites More sharing options...
DreamNofR1 Posted April 4, 2015 Author Report Share Posted April 4, 2015 (edited) Jason is right. I'm not concerned with getting more power...I've had this thing for 4 years and it still scares the crap out of me at times when I crack the throttle. I'm concerned that something is wrong and at almost 11k miles, I shouldn't be having motor issues.These come stock with 180 hp to the crank....and the dyno sheet Bubba posted is correct. I've seen these dyno anywhere from 152-157 hp to the wheel. So for this being almost 20 hp off, something isn't right and I noticed it last year when I went to the track and the top end felt very sluggish. More than anything, I wanted to put a feeler out to see if there might be an issue I wasn't aware of. Maintenance will happen, that's a given, but changing fuel and spark plugs isn't going to remedy 20 hp. Edited April 4, 2015 by DreamNofR1 Quote Link to comment Share on other sites More sharing options...
Gixxus Christ! Posted April 4, 2015 Report Share Posted April 4, 2015 If valves are adjusted properly and new plugs don't get you where you wanna go I'd start looking at what you've changed. Is the exup (or whatever yamaha calls it now) valve working properly? Can you fool the computer into opening it with the link pipe off so you can confirm full operation? Tps set properly? Throttle bodies synchronized? getting full fuel pressure to the rail? Fuel injectors showing proper resistance and operation? Secondary butterflies opening fully? If it were a major internal mechanical issue you'd be hearing horrible noises as your bike digested it's own innards. It's likely something to do with the fuel and air going in or the exhaust going out. 1 Quote Link to comment Share on other sites More sharing options...
DreamNofR1 Posted April 4, 2015 Author Report Share Posted April 4, 2015 ^ That's more along the lines of what I'm looking for. Good info, thank you. I'll have to dive into this a little further. IP, while its going to suck paying for tests and whatever else, is probably my best bet so they can go over all of what you mentioned. Quote Link to comment Share on other sites More sharing options...
oldschoolsdime92 Posted April 4, 2015 Report Share Posted April 4, 2015 (edited) I forgot about the Exup- those are prone to sticking and not working properly. The heat cycles cook the oem grease. The best thing Id found to work , was good ol anti seize on the bushings. Another thing to look at is your ducting going to the air box. The fz1s ducting pulls from under the seat and I recall a fellow sucking his owners manual into it. Edited April 4, 2015 by oldschoolsdime92 Quote Link to comment Share on other sites More sharing options...
Bubba Posted April 4, 2015 Report Share Posted April 4, 2015 he's not asking if he needs the power.. hes asking why his bike isn't making the power it should make.. don't confuse your thoughts for reading comprehensionas far as not being far off.. your incorrect.. 156 brand new at the wheel and 137 is 20hp difference .. that's massive.. its not an age thing as my wifes made the same hp with 17k on it and 7 year old with nothing but hard ridden track miles.. as it did when new.. so obviously something is off.. Twizted: I'm almost positive my reading comprehension is at least as good as yours…. OP said that his dyno reading was 137 HP at the rear wheel, so I assume from his statement that the number Brian gave him is NOT corrected for driveline loss. Most vehicles have some efficiency loss attributable to the driveline. I've seen loss estimates in the 10-15% range, so if you do the math, his HP rating at the crank is pretty damn close to the crank HP rating published by the manufacturer. Just because the OP did some mild aftermarket mods to the intake and exhaust doesn't guarantee a huge gain in HP. What you missed in MY ADVICE (damn, there's that reading comprehension again) was that, if he wanted more HP, rather than put a lot of money into trying to boost the stock motor with mods, he would likely be better off selling the '07 and picking up a newer, lighter, fresher R1. But thanks for the good advice. I'll try to not get confused by my thoughts in the future and I'll certainly practice up on my reading skills!!! Quote Link to comment Share on other sites More sharing options...
TwiztedRabbit Posted April 4, 2015 Report Share Posted April 4, 2015 you still missed the point but that's cool.. go ahead and posture its fun Quote Link to comment Share on other sites More sharing options...
blue03636 Posted April 4, 2015 Report Share Posted April 4, 2015 Bubba, your crank numbers are low, they are rated for 185ish at the crank which would mean 155ish at the wheel therefore he's 20 low. I'm putting in another vote for the exup and plugs. 1 Quote Link to comment Share on other sites More sharing options...
Bubba Posted April 5, 2015 Report Share Posted April 5, 2015 (edited) Bubba, your crank numbers are low…. Dammit, I hate when that happens. Shit starts to go to hell when yer 65….need more Viagra. So, how's my reading comprehension? Edited April 5, 2015 by Bubba 1 Quote Link to comment Share on other sites More sharing options...
whaler Posted April 5, 2015 Report Share Posted April 5, 2015 (edited) I think CSC brought up a good point...EXUP can be a problem, but it will cause major bucking as the RPMs rise and will run like shit.Secondary flies would be my first bet. That would definitely lower HP and the bike would otherwise run well...like adding a restricter plate. It would not show up in a dyno pull as the af ratio would still be fine running on primaries alone. HP would be the only indicator.Being a 2007 and the 4 valve head, you should be seeing solid 160's with your mods. Edited April 5, 2015 by whaler Quote Link to comment Share on other sites More sharing options...
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