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I strongly advise on not using the Takegawa Big Bore kit. I purchased 2 of them. I also use the Takegawa Cams, along with a Bazzaz Fi controller and full exhaust sytem. yeah it made awesome power, for about 80km (race track kilometres).
The first one had a gudgeon pin failure, and the inlet valve had also touched the piston.
The second engine snapped a conrod. Again low km.
i went back to Takegawa to inform them there product may not be well enough refined. There response was "not our problem"
Funny thing is they sent me pics, they are aware of these problems, they know they haven't refined the piston valve clearances. They also claim the Honda conrod is the problem. The Honda conrod is fine in the standard barrel, just no good in the big bore.
Ive asked them to remove this from sale until it is further refined but they are refusing.
Save your dollars, don't buy from them. It cost much more when the conrod is hanging out the front of the engine cases. And they except no liability.
 
Wow thank for the heads up @OCD
Have you posted about this anywhere else or what? Seems like there needs to be more awareness about this.
 
Factory horsepower will generally always be more reliable than aftermarket horsepower... I honestly don't see the point of throwing a whole bunch of money (and time) at these small displacement bikes, trying to eek out a few more horsepower when one can almost always buy that extra power right off the showroom floor, and have factory reliability to boot, for far less money. In other words, if a CBR250R/300R doesn't have enough power for ya, just buy a CBR500R... if that isn't enough, get the CBR650F.

I recall on another forum website, some kid (20 something) wanted to know what he could do to make his new Honda CRF250R so it could keep up with his buddies CRF450R. No one could tell him (as in he didn't want to hear it) that he should have just coughed up the extra $300 and bought a CRF450R in the first place. :rolleyes: I don't know anymore... I'm thinking that perhaps good old common sense is somehow being bred out of the human genetic code?. It sure does seems like there are more and more dummies wandering around these days.
 
Factory horsepower will generally always be more reliable than aftermarket horsepower... I honestly don't see the point of throwing a whole bunch of money (and time) at these small displacement bikes, trying to eek out a few more horsepower when one can almost always buy that extra power right off the showroom floor, and have factory reliability to boot, for far less money. In other words, if a CBR250R/300R doesn't have enough power for ya, just buy a CBR500R... if that isn't enough, get the CBR650F.

I recall on another forum website, some kid (20 something) wanted to know what he could do to make his new Honda CRF250R so it could keep up with his buddies CRF450R. No one could tell him (as in he didn't want to hear it) that he should have just coughed up the extra $300 and bought a CRF450R in the first place. :rolleyes: I don't know anymore... I'm thinking that perhaps good old common sense is somehow being bred out of the human genetic code?. It sure does seems like there are more and more dummies wandering around these days.
oh absolutely, I was on the grom site for a bit and there was one guy over there poured equal money to MSRP into his grom for big bores and assorted other horsepower seeking equipment. At the end of the day its a $1000 difference between the grom and the 250R.

Quite agree on the common sense sentiments, its definitely not an accident ;)
 
I always agreed with that, rather buy a bike with the power I want rather than going through serious mods like that which i rather not do.
 
oh absolutely, I was on the grom site for a bit and there was one guy over there poured equal money to MSRP into his grom for big bores and assorted other horsepower seeking equipment. At the end of the day its a $1000 difference between the grom and the 250R.

Quite agree on the common sense sentiments, its definitely not an accident ;)
And at some Honda dealers around the country, with the big discounts being offered on remaining new 2012 CBR250R's, you can buy one for about the same price ($2999) as the Grom. Even though the Grom is kind of a cool little bike, at the end of the day I'd have to put that three grand towards a full sized bike. If I really had to have a Grom, I think I'd wait a couple years when some of the people who bought them new get bored with it, and decide to sell... I'll bet that in a few years you'll be able to pick up a used one for $1700 - $2200
 
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