Hp?

[archie-no2]

Could any body be able to comfirm the true hp of a fully stock 1996 gsf250s bandit, gj77a.
Because i am seeing varying results on the internet ranging between 38hp-45hp.
Also how does this compare to other 250 bikes?

Thanks

[woodyracer]

well the new hyosungs have around 30hp at the crank, so about 27 of so at the rear wheel
I know the 1991 cbr250rr's have 46hp at the crank

[sil3nt]

45hp would be at the crank. So 40 at the rear would be about right.

[The Everlasting]

I think it's 40Hp at the crank,that's what the factory claims.

[woodyracer]

I think it's 40Hp at the crank,that's what the factory claims.

that sounds more like it, they are slightly restrited motors so they wouldnt be puting out as much juice as a cbr250rr

[SPORK]

Pre-94 (or is it 93?) Bandits claim to have 45hp, whereas the post-94 models have 40hp. All at the crank, and probably inflated to boot. Faster than any 'modern' 250 though.

[SS90]

Sob Sob sob,........

every month or so this subject comes up.

I have spent about 10 years operating dyno's in several countries around the world, and when in NZ, I was doing 250's quite alot.

The internet lies to you, and the claims made by factories are always bolstered to improve sales (and, yes, they are at the crank)

I think I have posted links to actual 250 IL4 runs about 5 times.

To date, no-one as EVER posted a dyno graph of a 250 on this site that I am aware of.

From memory.

91 and up CBR250's are around 37PS
89 and up GSXR250's are around 35PS (bandit's about 32)
88/89 ZXR250's about 32
91 and up ZXR250, about 34

I have never personally seen an IL4 250 make more that 37PS.

Exhausts make no difference, no matter what "the internet" says.....or your mate, or your dad.

Oh, and how did honda make substantually more power than others with the later model CBR's........they revved to almost 20K

I found this with one google about 6 months ago......can any one find one with substantually more????????

"My mate said", or "I know a guy" does not count.

[archie-no2]

Thanks, im only wondering because some bandits arre restricted to 40hp (factory rating) and others are saying that after 1994 they stoped making the restricted and only made full hp models after that. so im not to fussed wheather it is putting out what hp, i more am wanting to know if it is a restricted model or not? Thanks ss90, thanks for the comparison between bikes, this may be a stupid question but where do you personally measure the hp output of the bikes when you are doing the dyno runs in nz (crank or rear wheel) and what is the hp difference normally between the two measurements on a 250?

[blackdog]

Thanks, im only wondering because some bandits arre restricted to 40hp (factory rating) and others are saying that after 1994 they stoped making the restricted and only made full hp models after that. so im not to fussed wheather it is putting out what hp, i more am wanting to know if it is a restricted model or not? Thanks ss90, thanks for the comparison between bikes, this may be a stupid question but where do you personally measure the hp output of the bikes when you are doing the dyno runs in nz (crank or rear wheel) and what is the hp difference normally between the two measurements on a 250?

in '95 the bandit(v) was unrestricted with a factory claimed 45hp. one of the best performing 250s i've ridden. i believe they were variable valve timing models which may explain it.....

[archie-no2]

gsf250v were the veriable valve timing models, they have the red cam cover.

[The Everlasting]

gsf250v were the veriable valve timing models, they have the red cam cover.


Yeah,stay away from those,I made the mistake of buying one,and it's gonna cost me a fortune to get it running right!!!

[AllanB]

If you add a Yoshimura can from a 2001 GSXR 750, iridium spark-plugs, K&N air filter but use really light weight oil on the K&N (like sewing machine oil), Mobil fully synthetic engine oil and go up one on the front sprocket you can get 52 rear wheel HP out of the Bandit on a dyno.

Based on running the bike in a temperature controlled room (19 degrees) with relative humidity of 67%.

A serious Hoy-bag eater and in the right hands quite capable of taking on a modern 600 IL4.

True story, I read it on the Internet.

[SS90]

If you add a Yoshimura can from a 2001 GSXR 750, iridium spark-plugs, K&N air filter but use really light weight oil on the K&N (like sewing machine oil), Mobil fully synthetic engine oil and go up one on the front sprocket you can get 52 rear wheel HP out of the Bandit on a dyno.

Based on running the bike in a temperature controlled room (19 degrees) with relative humidity of 67%.

A serious Hoy-bag eater and in the right hands quite capable of taking on a modern 600 IL4.

True story, I read it on the Internet.

I'll bet ya did!

[SS90]

Thanks, im only wondering because some bandits arre restricted to 40hp (factory rating) and others are saying that after 1994 they stoped making the restricted and only made full hp models after that. so im not to fussed wheather it is putting out what hp, i more am wanting to know if it is a restricted model or not? Thanks ss90, thanks for the comparison between bikes, this may be a stupid question but where do you personally measure the hp output of the bikes when you are doing the dyno runs in nz (crank or rear wheel) and what is the hp difference normally between the two measurements on a 250?

Pretty much any business will have a dyno that reads at the rear wheel.......crank horsepower is for homo's.

Basically, measuring at the crank removes the losses of the transmission,(and chain,and sprockets, and bearings,and tyre), and measuring at the wheel includes all these losses (ie, the amount of power applied to the ground)

[JR1]

does anyone know how much hp the fzr250 puts out? now i dont belive the stats iv read on the net after reading this..or know what to belive now :confused:

[woodyracer]

does anyone know how much hp the fzr250 puts out? now i dont belive the stats iv read on the net after reading this..or know what to belive now :confused:

The FZR's about about 30hp at the wheel

[sil3nt]

I would hope its a little more than that!

[woodyracer]

I would hope its a little more than that!

why?, 30hp at the wheel for a 250 is bloody good, as seen cbr250's are 35.......

[SMOKEU]

Could any body be able to comfirm the true hp of a fully stock 1996 gsf250s bandit, gj77a.
Because i am seeing varying results on the internet ranging between 38hp-45hp.
Also how does this compare to other 250 bikes?

Thanks

A mate of mine has a 1996 Bandit 250cc. 0-100kmh it's a tad slower than my CBR. On the open road however, the CBR starts to really pull ahead of the Bandit. Especially at speeds over 160kmh.

[sil3nt]

why?, 30hp at the wheel for a 250 is bloody good, as seen cbr250's are 35.......Just found this http://www.factorypro.com/dyno/true1.html

Slightly more than 32 :bleh: I can now breathe a sigh of relief as i have a strange attraction towards the FZR250 (never actually been near one though!)

[SS90]

does anyone know how much hp the fzr250 puts out? now i dont belive the stats iv read on the net after reading this..or know what to belive now :confused:

The later ones where quite grunty.... from memory the early ones (87) was about 29, then came the 89 like yours, and that was around 32 and the 91 was 36. Those numbers aren't concrete, but they are pretty close.

Be very careful what you read on the net when it comes to claims on power for 250IL4, this 42 rear wheel horsepower nonsense is just silly, like I have never seen anyone ever be able to furnish even on single dyno run for one of these bikes to support their "my mate had 43" claims.

These bikes (particularly the later "Baby Blade" CBR's and FZR's) where really highly strung (and oddly enough really reliable), to "make more power" out of one of these engines is a dream.

They respond really well to a "tune up" (particularly the CBR), when things like spark plugs get changed. You would not believe how well the CBR 250's respond to a new set of plugs.

On these "wee screamers", the only thing that needs to be maintained that is "extra ordinary" (other than the normal valve clearances etc) is the emulsion tubes and needles in the carbs. These wee buggers rev over 18,000 (some models) and there is alot if resonance in the air box, rattling the (plastic) carb slides back and forth in the carb bodies, putting extra load on the emulsion tubes and needles.

Once these bikes hit around 40,000 KM, you may find that it looses a bit of power, and "runs rich" all the time (black smoke out the exhaust, sometimes cuts out, then hard to start)

Replacing these carb parts will normally be the solution.

Japanese IL4's are great bikes, and, in general, cheap to run.

[SS90]

Just found this http://www.factorypro.com/dyno/true1.html

Slightly more than 32 :bleh: I can now breathe a sigh of relief as i have a strange attraction towards the FZR250 (never actually been near one though!)

I have seen that site before, and I have to say it is a little contradictory, but, it is nice to have some data to compare.....my personal experience has been that all the data on that site is on the low side..... (for example it's common knowledge that all post 94 Honda RS125's put out MINIMUM 41 ps) no matter though, horses for courses!

[{.bLanK}G_o_D]

To date, no-one as EVER posted a dyno graph of a 250 on this site that I am aware of.

Really?

I will be getting Nessa dyno'd in the upcoming future. She's no longer a 250 but she use to be so still kinda counts. I'm hoping for over 70hp at the wheel. Be sure I will post the graph when It's done.

[Beren]

At the risk of spreading worms everywhere...

Is there somewhere North shore I can take my ickle bandit to have a Dyno test? Not really sure when i would be doing a lot about it - not going to be doing a lot that needs extra grunt through the winter, but come next summer the baby is going to meet some track days...

I would guess that the easiest way to gain HP is actually just to replace the ones that have run away - by rebalancing carbs, cleaning jets checking valve clearances etc. Not to mention the fact that i suspect the magic of the bandit is holding high cornering speeds with decent rubber (And possibly a suspension upgrade...) rather than looking for more power.

However there were fabled higher performing Bandits of old - is there any way I can get my hands on that extra 5hp easilly, or was there something significantly different about the engines?

[Paul in NZ]

These bikes are around 20+ years old. They have been thrashed by insecure learners and maintained with minimal servicing if at all. It can make all the hp in the world but its no good if the chain / sprockets are rooted and the brakes are dragging. If I was going to purchase one I'd forget the dyno and find one in the absolute best condition I could find and if it has a service history so much the better.

Remember that these bikes were never intended to last this long but were intended to be cheap. The suspension went off 2 weeks after the first owner thumbed the starter and they can handle like a drunken camel looking for its next meth fix at an ice rink with a kiwi lad aboard. A suspension upgrade is easily worth 5 hp or more.

In short - the mere mention that someones 'improved' the engine output would be enough to send me screaming away from the deal as fast as my stubby little legs could carry me...

[Beren]

These bikes are around 20+ years old. They have been thrashed by insecure learners and maintained with minimal servicing if at all... Aye. When I bought condition was the most important thing. 18,000 K's very good service history, minimal mods etc. I will have to do the clutch soonish but other than that it seems pretty tidy. The chain, sprockets, brakes, bearings etc are in very good nick.

A suspension upgrade is easily worth 5 hp or more. I thought that might be the case. Once I have the pennies put aside to do it I will be looking to replace the rear first then possibly the front.


In short - the mere mention that someones 'improved' the engine output would be enough to send me screaming away from the deal as fast as my stubby little legs could carry me...
Yup me too, that's why I was interested to see what it had lost and mostly just look to try and return it to what it should put out if it has lost much. Unless there was an ECU or something that I could change simply to change it from a 40hp model to a 45... something small and relatively un-noticeable.

[tigertim20]

Could any body be able to comfirm the true hp of a fully stock 1996 gsf250s bandit, gj77a.
Because i am seeing varying results on the internet ranging between 38hp-45hp.
Also how does this compare to other 250 bikes?

Thanks

It depends on where the measurement is taken. 45 will be at the wheel, so about 38 at the wheel would be right when you take into account everything the power gets transferred through by the time it gets to the back wheel, crankshaft, gearbox, clutch, chain, cush drives etc.

having said that, if your bike has 30,000km on it, then you can bet that its got a few less now as well.