Whos Ready for the next generation Z bigbore

[Bryan Raffa]

after a Nice talk with Harry Klemm today it seems that http://www.klemmvintage.com/ has had about 10 people call in the last 6 months about work.. after posting this picture on FB ... This will not be a pre order or order now! No Deposits... I will be supplying Harry with everything he needs to make a 341cc Z motor using all stock stuff.. so he can make the sleeve and new piston... using a stock head. seems there was another fellow gonna send his motor for this a month and a half ago.. with I would have known .. would have been on the ball a month ago .

he does 250 cylinder porting and head work .. but you are NOW looking at the first all new 341cc. since the 80's

Dirt Wheels January 1986:
Article on a 85 tri-z with a big bore (350cc) conversion. Used a 38 flat side Mikuni smooth-bore to a 40. Had a Trinity 6 inch extended swingarm. Center R/L cases had to be machine to take the new cylinder.


I'm about to GIT SOME! if you search klemm big bore you will find ... the beginning of the Sprock big bore .. and alot of HR ..


who has the full article scan?

complete kit without pipe will be around $1000 OF BAD ASS POWER!

once this kit is done it will be available . through. Klemm Vintage, very excited that everything will be readily available . WAY MORE TO COME!

[RIDE-RED 250r]

That's AWESOME Bryan!

I heard something about this from the brother in law today (Beadle350x)... Seems to me an outfit like Klemm wouldn't bother with such an undertaking if they didn't think the market was there.... It's about time you Yammi guys are getting some aftermarket support again!

Is this going to replace the 490 by any chance?? Bet it's going to be a rip-snorter!

[Bryan Raffa]

somebody scan the full article . please LOL NO it will not replace the 490.. it probable will be my flat track bike/ice racer but thats a different story.

this is about the the the Motor Kit ,, being developed and produced... and readily available.

[jays375]

What has to be done to the bottom end?Will it take the increase of more cc?

[Bryan Raffa]

it has already been proven... in the 80's machine work to both cases to accept the sleeve and thats as far as I will get into it .. Harry has all the spec's from the 80's for the 341 and the 250 National .. but is not just gonna let it out when you rattle his phone ...LOL your gonna have to wait till he develops it again .

[90guy]

Actually really pumped up to hear this.... When time to comes to bring the Z down for a restoration this will have to be on the list!

[Bryan Raffa]

I have searched .... someone scan it for me!

[RIDE-RED 250r]

Wish I could but I have no idea how!

[volfan537240]

So you supply the jug, head and cases and he bores and ports and I get a carb too? Count me in.

[badass350x]

Glad I mentioned it to you raffa , to many Irons in the fire and not enough time, this is why I asked you about a motor awhile back!!!

[Bryan Raffa]

So you supply the jug, head and cases and he bores and ports and I get a carb too? Count me in.

NO CARB.. NO PIPE

supply ,,head, jug, crank, cases... that picture of what it costs is from 86 Prices have changed LOL...

best part about this..... NO PRE ORDER, NO DEPOSITS, NO WAITING, YOU WANT IT YOU BUY IT ....SIMPLE!

[volfan537240]

Does he still make exhaust too? I can't imagine a dg breathing good enough for a 341 haha.

[Bryan Raffa]

Does he still make exhaust too? I can't imagine a dg breathing good enough for a 341 haha.

Nope but my dyno port will... who knows maybe he will build a pipe again...

[TatTooL23]

Wow that's really cool. Now they might be able to hang with a 250R.....lol

Sorry, had to do it

No but that is really awesome they r doing it

[Bryan Raffa]

Boxed up everything,, giving Harry one of everything... Ready to go out! Very Excited!! wasting NO time!

I'm Really Hoping someone can scan the full articles out of Dirt Wheels jan 86.. I will continue to look for a better scan on the site. I will keep everyone posted as i get info.. maybe GIT Harry in here..