modding a r15

hi joel

have u also modded a r15 with just the free flow exhaust + k&n air filter + iridium spark plugs+ porting in the exhaust port ?

all this without the big bore done ?

^The bigbore makes the best difference, rather a world of a difference.
For pricing, send me a mail.

With the big bore+exhaust+revised head+airfilter and ECU, IMO the bike's performance should be on par with the CBR250R or maybe even better than it, because with all those goodies on YZF-R15, it's power-to-weight ratio should be more than the CBR250R since R15 is very lightweight :-D:-D

I personally feel its not fair to compare any ''modded'' bike with another in stock condition, no matter what the engine displacement and horsepower. Comparos should be only done on level ground, stock vs stock. If Mr. Joel, or any other bike tuner of fair reputation decides he wants the CBR250R to go faster, he'll probably work on it till the single cyl. 250cc is churning out 35BHP There are videos on youtube of modded Rx100s beating the Ninja250R and such, but what's the point? You mod the ninja with equal enthusiasm and the video will turn out a little differently

Sorry for this OT, but had to say it

Absolutely right!

Quite possible. R15 does have the Power to weight advantage. So with the above mods complimented by a fully blown cylinder head and modified intake should make it as quick as the CBR250 atleast on paper while only running on the 165cc Kit.

I think there's nothing wrong in comparing the two bikes. Stock bikes are modified to be faster and sometimes compared to their faster rivals in one way or the other. It may not be the logical thing to do, but then it's not harmful either. Besides comparing bikes is fine as long as the discussions are healthy. I personally would like to learn on what parameters my bike would lag behind the CBR250 and how I can have it improved further.

One of my intentions of doing this mod was to retain the running cost of this bike while improving it's overall performance. Currently I've struck a good balance between the two. Even when it's complete it would be cheaper to run it than a 250cc and the overall cost of the bike + upgrades would be lesser than buying the CBR250. So its a Win Win situation for me. It made no sense to me to invest in a single cylinder 250. Ofcourse Joel will find ways to get it to perhaps even 40-50BHP if and when he works on it. Then again it all boils down to one thing: I love my R15 and I wont trade it in for a sober Honda 250. Again all this for comparison sake only and these are my solely my views.

Chip in the price and things do make a lot of sense. With Joel's mods, you don't look at the CBR250 for competition. You look at the Ninja.

Bingo. Being a Honda, don't expect a maxed out engine on it. Hopefully, it has some mod potential. Being an international product one could expect that.

Perfectly said! Once you mod ur bike, u look to see what vehicles u can compare with.. Since the current benchmark for the 250cc category is the Ninja, anyone with a modded R15 would like to see how it would stack up against a bigger bike.

@kwokfist - It would be a pleasure seeing the owners of CBR250R mouths wide open when fly-by past them :-D..lol..

@samyaza- if 'The R15' outruns Ninja 250 then it obiviously outruns CBR250R, right?

P.S- Joel'ed R15 should also have the advantage of mileage factor over CBR250R, isn't it?

On paper, yes. On the street, we'll see

Hmmm, now when I think about it, I guess you guys are right, but the comparisons would be on a personal level, meaning, I can say ''MY'' R15 will beat a CBR250R, but can't say ''R15 can beat the CBR250R''. So, it will be a personal comparison to satisfy oneself Nothing to write reviews about. Thats all I was trying to say.

When people say the S1000RR beats every other thing on two wheels, they're obviously referring to the factory stock bike

My street R15 is 1 sec quicker to 100kph than a Ninja with a two Brothers exhaust. What does that mean? I get more fuel efficiency at pretty much WOT riding than a Ninja at 50-80% throttle. This is a street comparo of both and not a race comparision even.
The CBR250 is far slower than the Ninja. So what are we talking about?
When pushed every engine has potential, but look at the costs involved. The R15 is the cheapest bike to build to get the max power.

Joel, can the RTR 160/180 be on par with the R-15.. performance wise if given similar mods. Isn't it the cheapest bike with highest potential to mod.

The RTR has the potential, but being aircooled has its contraints as well. A lot of engineering has to be done to get it going strong. yes it has a very capable motor. Which is why I still love it. But the R15 is still bang for the buck. You cant beat the 4 valves and the compact engine package. The best stuffed and packaged bike ever built in the recent times.

This is some great info sir! I never knew the R15 was capable of such feats! The power to weight ratio must be enormous on your bike! Have you dyno tested it to get the power generated at the wheel?? I'm guessing it would be anywhere between 22 to 25 HP

Apart from the goodies you are currently selling for the R15, have you done any other mods on your bike specifically? Are those mods possible on other bikes too? I'm sure you spent a lot of time and effort fine-tuning it

Cheers! \m/\m/