424 Stroker???

[krt400ex]

i was thinking, couldn't this be done. u just stroke it 4 mm and leave the bore stock instead of boring it to a 416 and then stroking it. is that possible??

[Wheelie]

Yes.

[krt400ex]

what kind of power would i get out if this, and would it be less expensive than boring it?? would it be faster than a machine bored to a 426?

[400exstud]

Here is my theory, take it or leave it.

Stroking an engine is a lot of work, a lot of parts ............ a lot of money. Boring on the other hand is fairly simple (and cheap) compaired to spliting the cases, replacing the crank, and so forth which is required for stroking.

Now here is the question for you. Why would you stroke a motor but not bore it? Boring is CHEAP and EASY power compared to stroking.

[Wheelie]

Boring is cheap and effective. Strokers are more expensive, but will make more power.

Ride a stroker someday and you'll know why people spend the extra money to have it done. In my case I already had the cases split to fix third gear, I simply took advantage of the situation and stroked it.

I've raced against big bore 400ex's, and I've toasted em'.

[krt400ex]

thanks for the input, but here is my question. for the xtra power, is it worth spending the money to stroke the motor or should i just go with bore. i am wanting to mod my machine a little next yr and i am doing some research on what is best for the money, and a 424 stroker is almost unheaard of. i might do that just to be different.

[Wheelie]

IMO it was worth the extra money. Ultimately it's comes down to the question of whether or not you want to spend the extra cash.

[krt400ex]

if i have the moiney i'll spend it if it is worth it. thanks for th input.

[†2005 400ex†]

Id say if a stroker is done right then they are the best bet, correct me if im wrong but cant a 440 stroker take a 450r?

[Wheelie]

Yes. Mine does.

[honda92]

i dont know if you plan to put a heavy duty rod in it at all but if your going to replace your stock rod, which wouldn't be a bad idea for a good reliable engine. you might as well stroke it because you have to take the crank out anyway.