Yet another ZRX

[J.B]

Big horsey's and torque there Josh....sweeet.

Do you know what it was putting out previously?

Was between 125 and 130 with the Kerker (and the stock internals ).

[furball]

Nice bike JB and putting out some serious GG's.
Love the pipe. Where did you score that?

[J.B]

Nice bike JB and putting out some serious GG's.
Love the pipe. Where did you score that?

K-factory header and mid-pipe and Asahina Racing silencer sourced through the man in Japan (Moriwaki Man)

[furball]

Nice!

[Phil]

So it looks like the std timing is the best compromise. Did you have the Yoshi cams in with the std bore as well as the 1224?

[J.B]

So it looks like the std timing is the best compromise. Did you have the Yoshi cams in with the std bore as well as the 1224?

Well, it's only the same total advance as stock, the advance curve is different

The cams went in at the same time as the big block.

[Phil]

yeh, was just comparing to the -2 and -4 cuves.

When mine gets its next service the valves need some shims so the cams have to come out, I have thought about putting different ones in but dont want to loose any bottom end or midrange to get top end, I dont use the engine there. Thats whay I was wondering if you could provide a comparison.

[J.B]

I get what you mean but mines headed a bit the other way. Not that it really needs any more

Sorry I could help out with the comparison.

[J.B]

Loving the whistle!

[kawadave]

Nice one Josh....

[bonester]

Angry ZRX!

[farmer]

That is one very nice bike Josh .

[Clarkixlc]

Mate that's some nice numbers getting outta that thing. Love the headers also. Not a fan of the muffler though. What carbines you got on it. Sounds the goods on the dyno.

[J.B]

Mate that's some nice numbers getting outta that thing. Love the headers also. Not a fan of the muffler though. What carbines you got on it. Sounds the goods on the dyno.

Cheers mate. To each their own

That's a set of TMR-MJN40's sitting in there.

[Nelso]

So it looks like the std timing is the best compromise. Did you have the Yoshi cams in with the std bore as well as the 1224?

Well, it's only the same total advance as stock, the advance curve is different

The cams went in at the same time as the big block.

So does the CDI allow you to adjust the advance throughout the rev range?

Did the carbs go on at the same time as everything else? I take it you went from basically a stock bike with a Kerker and jetting, to a 1224, Yosh cams, new exhaust system, carbs and ignition tuner. I bet it feels quite a bit different to ride....... and will surprise a few guys on their sportsbikes.

If you are happy to share, did you deck the head or run a thinner head gasket as well as the high comp pistons, or keep all of that at stock spec? If if you did change heights, do you know what squish and valve clearences you are running? Also, was there any porting of the head, valve's cut, or valve springs and retainers changed while you were at it? If so, was it CNC'ed or done by hand, done locally or sent to the US? Was the block done locally too? I'm curious to know what kind of power and torque increases you can realistically get for each stage of modification as I'd love to go to a 1224 (but with ZZR cams for better bottom end) after I sort the forks and swingarm on mine, but the cost of boring and re-nikasilling the cylinders over here is going to be a big cost factor and I don't know of anyone that is familiar with ZRXs that could CNC port the head without losing the torque.