125-200cc I Rode The Prototype Wr200 And It Is Amazing...

Looks like a Gasgas 200 or Suzuki PE175 sized piston but with one ring. I want one of these kits bad! Keep up the great work you guys are doing!

Basicly the same diameter but everything else is different. Cool piston all the same.

Thanks for the demo, I will get this cylnder out to Walt ASAP,Just need to know what to send with it etc.
Dave

far out that piston looks big can wate to swing one of my rod my 04 has only got 5hrs on it look like ill have 2 spears for the 99 mod

Just looking at the above picture It would appear that the pin is offset in the piston. Is that what you wanted of just the base blank they modified to your specifications. I hate to divert your thread but is there a logic to this offsetting of the pin and do other 167 kits generally have an offset pin.

They offset the pin 1mm to the exhaust side. The yz125/144 motors went this way and I chose to keep that as part of the design. I don't know the exact engineering behind the design as those days are 30+ years in my past. I expect there is some minimal advantage on the power stroke down with a sligtly more vertical force on the y-axis between the pin position and the big end pin position. I like the way mine is wearing and had a lot of hours on the yz144 piston in a couple of top ends with good results. So it was a conscious decision with minimal understanding of why the engineers at Yamaha chose this design.

Offset pins help to reduce piston rattle as well as improve ring seal by consistently loading the skirt and stabilizing the piston.

When do you think the skid plates will be completed? Will they fit the 09? thanks

What he said.

This is a great thread. Thanks for detailed dissertation K.
I did not know that noses were tweaked.
Also to add to my example list remember HM Honda is THE Honda importer for Italy, so they are like the Husqvarna NA of that country. They have say over how they present the machines and have special relations with honda Japan, just like our (sort of US model)TXC model for example. You will also see that Valenti Suzuki the Italain importer also builds enduro comp versions of Suzuki's as well as the standard MX versions.
PS be nice and gentlemanly to the new bike dealers and distributors but F the tweaked noses, take "used" bikes for the custom builds and sell them as used bikes with all the kit stuff on them.
sorry I got some moto passion going there, this is not my biz. seperate parts kit kit kit that is the answer you guys got it dialed in.

I will be at this demo day with my fam... I will be bringing my boys 70cc he got for christmas so he can play around in the kiddie area. I will also be bringing my 09 wr125, and it will be available if anyone wants to try the bikes out back-to-back for true comparison.

hello,

I like this thread^ ^

I will offer my wr the kit 165cc

sorry, I do not speak very good English

h

ay kel i realy like what you n walt are doing the pipe looks a little out of place but im sure you will sort it out ill be sort n my out as soon as i can project 165 will start in the next week or two i swoped bikes with my mate he has a kdx 200 i was on my wr300
and my son was on the 1ne the kdx is a little down on power but it was good fun the 1ne wes not likeing the 91 pump fuel keep stallni so i ended up on the 125 and 14yr old took control of the 300 me and my mate on the 200 left my son and a mate way back on the trail the other mate was on my dt200 2 37 yr olds on small bores geting very loose i had to setell my horne ween i put it on reserve the kdx ante got nuthin on the 125 now cant wate to put it on the trail in 165 form it will smoke the kdx LOL

That things never looked so good

Good to see excitement building again!