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Hi all,

I have a 99 unrestricted busa with a 4 into 2 into 1 full yoshi system, power commander and was recently re-mapped through dyno.

I viewed the graph print-out and although all seemed well I noticed that it only pulls 154 BHP. This appeared strange and when I questioned it I was told that this was the horsepower the bike produced; mind you, it only has 37000 klm and is hardly ridden.

Does this sound right?

jimmy g

is it copper cause all the copper ones are slow but the HP reading is about right they ranged anywhere from that to 160 stock

Mine pulled over 170 HP, allow for the fact that all dynos and numbers vary a bit, 154 seems a bit low.
4 into 1, pcb, but airbox mod and pair removed.

154 bhp is the stock output at the rear wheel of a 99 busa...

All other claims are not on the corrected dynos or are modified to some extent.

[quote=xhiler8r]
is it copper cause all the copper ones are slow but the HP reading is about right they ranged anywhere from that to 160 stock

No, its Red and Black.
I just found it strange because I have on video a stock copper 99 busa pull 173 on the dyno.

They were comparing the busa with the black bird and the ZZR 1100.
The blabk bird pulls 153 stock and the zzr pulls around the 140 bhp

Depends on what ramp rate the dyno was set at . I've seen up to 20hp difference on some dyno's , depends on the operater.

Thanks for all your input guys,

I'm not sure how the dyno was set up but I do know that Crusty Furgerson's (Australia Superbike Champion) Chief mechanic James Murray Parkes remaped the bike personly and put it through the Dyno. When I spoke with him he explained to me that its a fantastic, well maintained and powerful bike but at the same time I really was bambuzalled with the ponies its pulling.

It is not all about HP jimmy.

The torque curve is the most important aspect of a good tune for the road.

The flatter and broader the better.
A stock 99 torque curve should start with a sharp jump up at about 2,500 rpm and slightly rise to between 90 and 100 ft lb at 7,500 rpm then gradually round down to the red line.
Overall it doesn't matter if it is 150hp or 180hp at it's peak of about 9,200 rpm, if it is a good flat torque line it is a sweet ride.

Here is my last dyno.

james knows his busas pretty well and if he worked on it im guessing you're in vic?? last time I spoke to him he was working mainly with one of the honda race teams and not at dynoverks that much. those hp figures sound ok for a stockie but with that exhaust etc I would have expected a little more. maybe do the airbox and block off the pair system before you get it dynoed next and see if that helps.

Hey maggot & Bugso,

thanks for your latest input. I am in melbourne and James does work for Honda racing. He is currently setting up the dyno's for a major motorcycle dealership here in melbourne and he is training the staff to use it. I think my busa was the first one on the dyno and he personaly put it through.

The graph torque consistancy is quite impressive and there are no flatspots etc. its a straight incline but once again with the current mods I thought it would be pulling many more ponies.

I'll post my dyno reading tonight when i get home so you guys can see what I'm talking about. I'll check out your reading Bugso tonight; the work internet wont allow me to open your attachement

Thanks once again guys; hopefully I'll see you at phillip island in a few weeks.

A powercommander on a basically stock street bike seems like a wasted effort (IMHO). They are not a panacea for huge HP gains as some ( a lot in fact ) seem to think.

OK in the racing environment where infinite fuel metering adjustment can get you a modest HP or drivability advantage over your competitors, but that's racing where every little bit helps.
156-160 HP for a stock 99 is on the money.

Add LARGE airbox mod, BMC or K&N Air Filter, PAIR mod, TRE, decent 4 into 1 Exhaust & now you are looking at 167-170 HP & like Busgo mentioned, a way fatter torque line up to 105 ft lbs. On the street, good torque characteristics are more useful than outright HP numbers for most riding conditions ( except Jindabine)

Ok Guys,

Once again thanks for all your suggestions and for all your input. I have attached the dyno as promised. I was able to read your print out BUSGO and have compared the readings.

Tell me what you think guys.

Once again thanx

Kind regards
jimmy g

Boy, those two dynos pretty much overlay each other.
I suppose your 4 into 1 yoshi and PC make up the extra 3 hp.

My 99 has a pair of Staintune race cans, K&N filter, the airbox flapper removed and a TRE fitted.

It is a shame that the torque curve is not shown on your print.

Overall they are pretty close. Mine also had a brand new slippery tyre on the dyno and may have lost a couple of HP at the top end due to wheel spin.

Hey BUSGO,

yours and mine are very close. Next service I'll put a K&N and follow the minor mods you have made on your and see if there is any further improvement.

I was also disapointed that the torque graph has not been included, i may give James a ring and see if he can print out a copy for me since its stored on the computer.

thanks once again BUSGO and every one else. let me know if you will be at Philip island next week...

Kind regards

jimmy g

No mate this is one of those rare years that I give the Island a miss.

I'll be glued to the plasma all weekend though.