Ummm.... 25 hp cbr?

[lilredmachine]

https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=9806&item=4560366045&rd=1
____________________
Bikes: too many, too much for one man to maintain anyway.

[robboadd]

Yup its the 150 not 125 the sell them in asia its a import I wouldve thought.

[McJamweasel]

I can see that. It puts it in around the same state of tune as a 600 supersports.

Probably c.20bhp at the wheel.
____________________
BCF: Be yourself, just don't be an arse.

[lilredmachine]

Might surprise a few NSR owners anyway.
____________________
Bikes: too many, too much for one man to maintain anyway.

[ZaphodBeeble]

What's the point of paying all that money for a 150cc though? I doubt they will sell it.
____________________
Current bike: VTR1000F Firestorm. Previous: Firestorm (written off) - XJ600 Divvy - NSR125 - DT125 and a load of offroaders.

[mrchips]

Might be worthwhile getting hold of a 150 engine for a 125 as I assume it will be the same frame.
____________________
Northern Irish? www.nibikers.com

[lilredmachine]

It still looks like a pocket toy and the rear tyres as thin as fuck. I never said I liked it, just thought it was interesting as a 150 4t with a good 20+ horsepower
____________________
Bikes: too many, too much for one man to maintain anyway.

[Kickstart]

Hi

Top end of the engine is quite different. 4 valve head rather than a 2 valve head, etc.

All the best

Keith
____________________
Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[DM]

I also don't think it makes any more than 20 hp, realistically 18-20. There would need to be some serious work done to that head to make it run anywhere NEAR 25, at which point that 4-stroke torque and reliability has likely gone out the window.

I've seen a few CBR 125's around with 150 kits on them and yes, they do get a nice little power boost, but only to somewhere around 16.5-17 hp.

[Rob W]

Trouble is, you cant polish a turd
____________________
TS50 > Senda 125 > ZXR400 > CB-1 > GSX-R1000 > Bandit 600 > ZXR750 H1 > GSX-R750 SRAD > '98 RR-W Fireblade > T595 Daytona > Hornet 900 > '04 Fireblade > GSX-S1000F (x2) > '23 XSR900

[TheShaggyDA]

https://www.bunch-of-arse.co.uk/assets/pants-studio-tin.gif
____________________
Current: CB500 Previous: CB100N, CB250RS, XJ900F, GT550, GPZ750R/1000RX, AJS M16, R100RT, Enfield Bullet

[i:6e3bfc7581]But still I fear and still I dare not laugh at the madman...[/i:6e3bfc7581]

[McJamweasel]

[Robby]

Also on the torque angle there, it helps if you have an idea what torque is.

To get an engine to make more power you are in fact getting to make more torque - power is just torque x revs. Unless of course you do no tuning work and just remove the rev limiter, in which case broadly speaking it will make the same torque and more power.

The two stroke 125s should be making more torque than the 4 stroke 125s, they just make it in a peaky nature. Do no confuse torque with low down power, and don't think that because an engine make good power high up it won't make reasonable power low down. Its all perceptions there.

[lilredmachine]

I have no doubt that the claimed power is near what they say, as those are the quoted Honda Thailand figures.
____________________
Bikes: too many, too much for one man to maintain anyway.

[Andy C]

they should get all cbr125 to be 150's that way clever young riders (eg ones that own RS125, NSR125 mito, xtc125) would be able to laugh even louder when they beat them!!! , poor cbr owners....
____________________
99 RS125 --> 02 SV650s --> 03 Speed Four --> 92 RXS100 --> 93 CB400sf --> 01 CB600f Hornet

[DM]

By saying "4-stroke torque" I was referring to the way torque is distributed on your typical 125 4-stroke compared to a similar-powered 2-stroke, which is generally seen as an advantage of owning a 125 4-stroke. It would go out the window as in shift well up the powerband, causing the bike to run more like a 2-stroke, at which point one must wonder what the point is in going to the trouble when one can just go out and buy a lighter-weight stock NSR or RS and make more overall power.

Anyhow, I just find it odd because apparently he just copied the stats from a CBR 125 (same compression ratio, bore x stroke, dry weight) and the only evidence that any work has been done is that it says "Tuned" and people seem ready to believe it. Says the CBR 125 has 13 bhp, which is false. No mention of what kind of work has been done, who tuned it or their experience. I'd honestly like to see some proof that anything has been done at all before believing a word of it.

And what are we disagreeing about mcjamweasel? You estimated 20 hp and I estimated 18-20 ..

[lilredmachine]

A CBR125 on a dyno has 12.8 HP at the crank. My MZ has 15HP at the crank on a dyno. This bike

WHICH IS NOT A TUNED 125! IT IS AN IMPORTED THAILAND HONDA CBR 150RR THAT HAS A THAILAND HONDA QUOTED 25 OR SO HORSEPOWER AT THE CRANK! IT HAS AN ENTIRELY DIFFERENT HEAD!

There isn't much of a debate in this case. It produces that, end of.
____________________
Bikes: too many, too much for one man to maintain anyway.

[lilredmachine]

Unfortunatly for the CBR 150 4t, the NSR 150 produces a Honda quoted 39.5 horsepower, so there is still no contest as such.
____________________
Bikes: too many, too much for one man to maintain anyway.

[DM]

Do you have a link to the page? I've been searching for an hour for a horsepower number...

[lilredmachine]

Same here, there are some really obscure pages written in Thai and Phillipino that I'm trying to peer through. I'm guessing that is it because I keep seeing it written as approximatly 18KW in Thai. The only English site I found didn't list the power

There is also some vastly varying power outputs, varying from 13-28 HP. More importantly though, there are owners reporting 160 KM/H on the speedo, pointing to a fair chunk more power than standard.
____________________
Bikes: too many, too much for one man to maintain anyway.

[G]

He also says 'Looks Good', so obviously can't be trusted .

I can remember seeing the CBR150 ages ago (before the 125 existed) and thinking 'how dare they call it a cbr' .

[lilredmachine]

Yeah, but my mates RS125 is alot easier to stall than my MZ, even though his is much lighter and has less inertia. Why is that?
____________________
Bikes: too many, too much for one man to maintain anyway.

[G]

'Often', I said .

A lighter flywheel could be one reason.

Try a 125 2st mx engine - I suspect it would make more -
and is a fairer comparison as it's an engine with a similar intent (as opposed to an engine designed for high peak rpm.)

[lilredmachine]

Ah, yes obviously there are many factors in this. I guess one would be my heavy fisted four stroke clutch left hand.
____________________
Bikes: too many, too much for one man to maintain anyway.

[DM]

Well, it's just how the manufacturer tuned his cylinder - needs to be revved higher at take-off because that's where the power is. While I've never ridden an RS 125, I can say that MZ's have clutches from the gods.