Time to seriously think about more power! 733cc

[KLRKTMGUY]

Originally Posted by willys

Off topic here...but your PM box if FULL and you need to lighten it to recieve any more PM's by the way! I just tried to respond to yours.

done.

[motocash74]

Originally Posted by rhino89523

A 2 stroke 500 in the Dunes on a paddle is an experience every dirtbike head should experience, unbelievable! Like a skate park for dirtbikes. The G's and the speed is sick! 500's smoke almost everything and you can lay them over like a street bike on that paddle. I am due for a dune trip!

A KX500 on the street is just as sick. Mine rocks!

[KLRKTMGUY]

Hope this is not a hijack.....should I start a new thread about engine transplant.

http://videos.streetfire.net/video/YZ550_715911.htm

[Human Ills]

LOL Willys. This is the most daydreamingest thread I've ever read.

Good work.

[willys]

I like to think outside of the box or pushing it to the limits....doesn't mean it will happen...but....maybe one person will come up with a possible simple answer that we can build upon...you never know unless you try....plus...not to mention ...it's fun to dream..isn't it...lol


You got any suggestions to up the pot?

[Human Ills]

I like the idea of a stroker with the 705 kit. I like the balance of the KLR and I wouldn't want to do anything to upset that.
Of course, what I really want is even MORE low end grunt. I wouldn't care if the engine shut down at 5k. I rarely go above that.

[Cdub122]

I'm about to pull my head and cylinder to start my engine project. I have a Schnitz 705 kit and 1mm oversized valves sitting in a box waiting. The head will be fully ported, and I'm seriously considering putting a set of hotcams in. They are a fairly mild increase in lift and duration, and work with the stock springs. I think that along with the valves and head work it may be nice. The only thing is that they don't use the compression release on the exhaust cam. From what I've read, as long as I have a good battery it is not a problem, the comp. release is mostly a holdover from when there was a kickstarter. I also plan to use the thinnest base gasket possible to get the compression up. I have a good aftermarket exhaust on it already, not too loud, but flows better than stock, and an Uni filter. Will mod the air box and work on the jetting after the engine is in. I think that is about as far as I can easily go with what is currently available.

A stroker would be awesome, but the rod and crank are one assembly, would have to have one custom made, and I think I read somewhere that there isn't enough clearance at the bottom of the cylinder for the rod. I'm sure the cylinder could be modified for clearance, I wonder what it would cost to have a custom crank/rod made??

[willys]

For the cams....don't you need to supply them a set to regrind?? If so that will still give you the decompression part of it..?
From what Cary had figured out...it is just the exhaust that needs to be changed unless you go hog wild with the cams.....he had done some testing with flow etc and even had one in Patman's bike IIRC....so the guy who bought Patman's bike has the best engine out there at the moment if it is still in the same configuration it was when Cary was working with Patman.
He gave his bike away for his asking price IMHO along with the bits that went with it....IMHO....someone got a screaming deal whether or not they realize it or not!

[Cdub122]

[quote=willys;809256]For the cams....don't you need to supply them a set to regrind?? If so that will still give you the decompression part of it..?/quote]


No, webcams and megacycles are regrinds, hotcams aren't. One of the reason I'm going with them, less down time, and I'll have my stock cams if I want to go back. I'll put in both I and E cams, mostly to get the overlap, I'm hoping to get a nice cam growl out of the bike as well!!

[bigklrguy]

Hot cams are all new not regrinds, they have only been out a short while for the klr. The lack of compression release does cause some isues.
I installed a hot cam in my hopped up atv (440 bb on a 400ex) and it turns over harder without the compression release. If its close to top dead center on the compression stroke you have to tap the starter button 2-3 times or it wont turn over at all. I've had this set up for 4 years and my starter has'nt failed.
I've never heard of a klr starter failing so it should stand up to the extra abuse.

[DaWhip]

Be sure and hit up a dyno after the hotcams go in. A before chart would be nice too, but internet beggars cant be choosers. We need some numbers to look at

[willys]

I have found a supplier for those cams in Canada.....now to sit while they try and tell me how much!

[KLRKTMGUY]

Originally Posted by willys

I have found a supplier for those cams in Canada.....now to sit while they try and tell me how much!

do you already have the stage II head ?

[willys]

Yep!


The problem is..I can't get any catalog info on cams from the two suppliers....lol....so I guess a phone call is in order.

[Pat Dolan]

Sorry I missed this thread earlier.

No need to wonder: a 733 (OK, 727) is quite do-able. I have been riding one for a couple of years. When I blew up my 650 stocker, there was no way I was going to put it back together stock. Too anemic for me. There wasn't any 685/705 option then, and when I asked here, nobody had any idea that there was much done with the KLR engine....until someone mentioned the "Sound of Singles" engines built by Steve Kesselring back in the early '90s. I did a lot of sleuthing around, and finally found him down in his new digs in AL, and asked him about KLR high perf bits. He explained that he had built 750 road race engines from them since the series standard Rotaxes were going for over $25,000 back then, and he did what he could to make a competitive engine for less than half that price. Unfortunately, the series was long gone, so were the bikes, and he didn't make any more parts before moving South. We didn't talk about these for some time, instead discussing some design stuff for a 125 engine, and he asked me why I wanted the KLR stuff. I told him my sad story, and he asked if I might want a 727. "What's a 727?" I asked. It was the development engine that Steve first built to get a feel for the KLR. He road it on the street for a while, and then it was tucked away in someone's shop or barn. Turns out they never even road it. So, I bought the whole bike and shipped it North.

The bike ('87) uses all bore, some compression, custom cams, a bloody big carb, obviously a lot of head work, electric water pump (there were cooling issues) and a Supertrapp at the end of a stock headpipe. No idea of the actual power output (I have done nothing but RIDE this thing), but it will run and hide from a 640 Adventure without breaking a sweat. What is really surprising that it is quite tractable. Power comes on strong from down low and builds nice and smoothly with revs. It was encouraging enough for him to go on to build a series of 750 race engines. They wouldn't do in the Rotaxes on a dry day, but was competitive on some tracks and in the wet.

When some of the four wheel projects get done, I will put my 650 back together as a 705 with the stock carb. I will be interested to see how close it will come to the 727 (although I doubt even with a lot of head work, it will have enough carb to get into the ball park). IMHO, this is the way the bike should have been built in the first place. In today's world, a 6 speed, direct injection and a full 750 is what the Versys should have been.