My Yamaha WR426F trike. This one is pretty darn cool!

[Derrick Adams]

Jason Hall and I had been talking for the last couple years about this build. I finally decided to move forward with it last fall. The goal was to build an OEM style modern Yamaha three wheeler, but with the twist of keeping everything "Bolt-On".

http://i92.photobucket.com/albums/l34/Derrick_Adams/downsized_0930121652_zps93168221.jpg (http://s92.photobucket.com/user/Derrick_Adams/media/downsized_0930121652_zps93168221.jpg.html)

I went with the WR426 because it was cheap. I wanted the WR for the lights and overdrive trans. I really want the 450 but honestly I can't afford it.

Here I stripped it to the frame. Nothing on the frame was tampered with during the build or assembly. All the original bike parts can be bolted back on at any time.

http://i92.photobucket.com/albums/l34/Derrick_Adams/downsized_1110121611_zps0fab3407.jpg (http://s92.photobucket.com/user/Derrick_Adams/media/downsized_1110121611_zps0fab3407.jpg.html)

I installed the entire back half of a YFZ on the bike thru careful selection of parts and well thought out mounts and such. Before the pm's hit my inbox I will tell you this is not a simple bolt on and go process. I narrowed the swingarm slightly, made several bushings and adaptor plates, ect.

So, anyhow.... Here it is.

http://i92.photobucket.com/albums/l34/Derrick_Adams/downsized_0619131600_zps925cb634.jpg (http://s92.photobucket.com/user/Derrick_Adams/media/downsized_0619131600_zps925cb634.jpg.html)

[Derrick Adams]

By some stroke of luck I was able to finish it the day we left for Trike Fest. Here it sets after my first 15 minutes of ride time.

http://i92.photobucket.com/albums/l34/Derrick_Adams/downsized_0620131642a_zps889b5064.jpg (http://s92.photobucket.com/user/Derrick_Adams/media/downsized_0620131642a_zps889b5064.jpg.html)

First ride was a success, although there are a few minor changes I need to make. First one is to get a real front tire!

I made it back to camp alright though.

http://i92.photobucket.com/albums/l34/Derrick_Adams/downsized_0620130918_zpsfd3eee6f.jpg (http://s92.photobucket.com/user/Derrick_Adams/media/downsized_0620130918_zpsfd3eee6f.jpg.html)

[nstyle73]

Very awesome, proportions look great and plastic matches very nicely. I'm not even going to ask about the modifications because it has to be one of those things where you are just going to do it and make it work, even if its not easy or there is an easier alternative.

[yamaha225dr]

One of the best conversions I have seen and would like to have in my shop!

[Derrick Adams]

Thanks go out to my best pal Jason Hall for brain storming and talking thru design and engineering with me all the time, as well as making me the sweet triples. Same to Louis Mielke and Garageboy34 for parts and encouragement. Last but not least (even though he never will see it) my friend and local machinist Glenn Steiner for all the help and use of his tools.

[oldskool83]

looks cool. i think the 426 will last longer then the 450s anyway.

[Kintore]

Saw this unit in person and it is one bad mammer jammer! well done Derrick!

[tommerp]

Oh Em Gee....

I MUST know more details on this...

[Dirtcrasher]

I got a good look at it also, awesome machine!!

Great build!!

[atc007]

Just a stunning bike. Very well done ! You have a nice fleet of Yammies there !

[Eric250R]

I also was fortunate enough to see it in person, pics don't do it justice, another amazing build by Mr.Adams.

[wisconsinite]

Very nice!

[Buck Snort]

Impressive!!!!!!!

[Worden18]

Awesome! Love it :)

[KASEY]

HA!!!!!!! very nice??? just very nice? OH MAN ,, I am going to tell you ,, the attention to detail above and beyond to the 10th degree. the fit and finish is unparalleled! totally blew me out of the water for sure, I LIKE IT ,,

[SWIGIN]

Very nice!

[90nut]

How did i miss this beauty? Ilike it! have a yz426 with a brand new engine sitting in my garage that would look nice on 3 wheels....

[Yamaha3wheeler]

That really is quite unbelievable how excellent and modern that turned out. What amount of money would it take for someone to come to you and you build them one (of course speaking in terms of you being interested in the job)? I'm SURE I'm not the only one thinking this.

[Darius1502]

Wow..how about some close up pics... I love what I think are those white forks?

[Derrick Adams]

That really is quite unbelievable how excellent and modern that turned out. What amount of money would it take for someone to come to you and you build them one (of course speaking in terms of you being interested in the job)? I'm SURE I'm not the only one thinking this.

You could own this whole bike for $4500. I won't be building any for customers or anything. Not to say I won't build a couple more myself though.

[Darius1502]

You could own this whole bike for $4500. I won't be building any for customers or anything. Not to say I won't build a couple more myself though.

Anymore pics???

[Red Rider]

It's more than pretty darn cool! Very nice job Derrick & Jason. I second the request for more detailed pics.

[Jason Hall]

That thing turned out SWEET Derrick!! Love the color scheme, and how well all the parts fit together..

[TatTooL23]

really really nice looking guys. very clean factory appearance

did u race that at Trikefest?

how does it run?

[Woodsrider]

That is one BEAUTIFUL trike !!

[Derrick Adams]

I literally finished the bike about 30 minutes before leaving for TF. I did run a few laps on it in Open Expert, but hardly at race speed. It runs like a YAMAHA!

[TatTooL23]

Oh so in the back. Ok cool. Lol

[OZQUAD44]

There was another guy on the net that had pictures of a wr425f converted to a trike, except his trike was road registered. That was a nice looking rig also.

Did you use the factory YFZ sub frame?

Being that the frame is unmodified, And using the factory two wheeler rake, did you anything to reduce the trail?

Are you using the two wheeler forks, or something else?

[OZQUAD44]

Hi Derrick, don't leave us hanging mate. Any more pictures, or info on the machine. It's my favourite conversion out there. Looks like factory, except for the front tyre. Would really like to know how it handles compared to a 250r. Would really like a crack at building one myself, perhaps if you did up a parts list you could sell the one off brackets and punters like myself could source the Yamaha parts and build me ourselves.

[the great gazoo]

Very cool indeed, but I'm more interested in the 225. I keep seeing shots of it here & there, but I've never seen any info on this bike?

[Derrick Adams]

There is a write up on the 225 here on 3ww.

OZQUAD, i'll have to get back to you on the handling. That front tire was for mock up only. Does not work well at all. I can tell you this, the geometry is exactly where it needs to be using all Yamaha parts. It does have a stock YFZ subframe, using brackets I designed to bolt it to the factory WR frame. It also uses factory YFZ shock, linkage, swinger (narrowed slightly), rear axle, carrier, brakes, air box, air intake, air filter, etc. Every single piece from the frame back is OEM Yamaha parts. In fact, everything on the bike is OEM Yamaha with the exception of my small parts and the muffler. The muffler is an aftermarket YFZ unit.

[Derrick Adams]

I will be racing it on Independence day. I should have a better feel for everything after that. I will update the thread with results.

[Dirtcrasher]

Yes, I want some close ups of the swinger mounts and an explanation of your rake if the neck was altered.

Excellent build!! I can't keep up with the ingenuity you guys have! :D

The TPC's must have a jig to get a neck aligned dead nuts....

[Derrick Adams]

Races went good. Handled well and ran strong. I snuck out the holeshot in the first moto. Somehow I ran out of gas on the gate in the second moto.:wondering

http://i92.photobucket.com/albums/l34/Derrick_Adams/downsized_0704131005_zps43c605a5.jpg (http://s92.photobucket.com/user/Derrick_Adams/media/downsized_0704131005_zps43c605a5.jpg.html)

http://i92.photobucket.com/albums/l34/Derrick_Adams/2013070495121800_zpsdee7d97f.jpg (http://s92.photobucket.com/user/Derrick_Adams/media/2013070495121800_zpsdee7d97f.jpg.html)

http://i92.photobucket.com/albums/l34/Derrick_Adams/20130704_154444_zps40db0eff.jpg (http://s92.photobucket.com/user/Derrick_Adams/media/20130704_154444_zps40db0eff.jpg.html)

[KASEY]

very cool!! a little r&d work ,, tell me more,,,

[OZQUAD44]

Derrick
Thanks for the extra pictures, awesome conversion. I can't get over how professional it all looks and I think being all Yamaha makes it.

I would love to have a go a doing one of these conversions

[crazyflights]

Looks great and very familiar. :)

Would you mind messaging me the deminsions on the tripple clamps? I'm thinking about building another and need to get some specs ready for the local machine tool class to cut me some tripple clamps.

[atc300r]

This is a cool conversion.Turned out great .Im a Honda guy but Id love to own one of these.Id like to see a Kawi conversion.

[Jwmajic]

That is a sharp looking trike great job.

[Darius1502]

Any chance of some nice close up of this thing?

[jays375]

Attending Ashtabula?

[Dirtcrasher]

Looks great and very familiar. :)

Would you mind messaging me the deminsions on the tripple clamps? I'm thinking about building another and need to get some specs ready for the local machine tool class to cut me some tripple clamps.

Your gonna need allot of dimensions there good buddy :D

[Derrick Adams]

Possibly attending Ashtabula. If everything goes good at work.

Contact Jason Hall for triples.

Not much time to take pictures. I'll work on that.
...

[Derrick Adams]

So just providing an update. I have had a chance to spend some good seat time on this bike now.

This is by far the best trike I've ridden to date. Now granted I built it, so I'm probably biased BUT... It does absolutely everything well! Soooo comfortable to ride. If it just had E-Start..lol

[KASEY]

these are words of encouragement as I am getting closer on mine!!! good work man good work!

[JasonB]

man i love that bike! looks just awesome! nice work all around

[85250r313]

The more i look at the pics the more i love this trike!!! You are an awesome trike builder, love your work!!! Thanks for the help with my project! I think i secured swingarm and axle and shock today, the party is about to start!

[NeverLift]

Absolutely fantastic Trike. But it makes me sad because about a year ago I traded my street licensed WR426f for a crappy Saturn when winter was coming. Shortly after I discovered 3WW and started seeing these conversions. Now seeing this awesome build my heart drops thinking I could have built a street legal WR trike.

176996
Man I miss this bike I kick myself everyday for getting rid of it

[NO-SCALES]

Excellent job man!!!!

[SUPERBEAST]

derrick your trike is in the new dirtwheels

[Derrick Adams]

derrick your trike is in the new dirtwheels

Yeah, I heard that.

[Derrick Adams]

I have worked out almost all the bugs on this bike over the last year and I love it more each time I ride it! Getting the suspension dialed in is the hardest thing. I still need to do some revalving on the forks, but it's pretty close now. The downfall to a dirt bike conversion is, you have to sacrifice ride height or ground clearance. You can't have both. I gave up a little on both ends and it seems to handle pretty good, although my 250F conversion handles a little better.

I added a set of YFZ cams and once I got the cam timing and carb in harmony, the thing starts on half a kick (even with the little YZ125 kicker)!