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Offline TCI Performance

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Project: YZ250R
« on: October 07, 2012, 02:17:52 AM »
I've been in process of building a 2-Stroke project bike over the last few weeks. I originally wanted to start this a couple of years ago but due to work I just now finally pulled the trigger.

I am currently past the half way point and in the middle of manufacturing custom parts at this point. The initial engineering, FEA and function checks have been completed and moving forward in putting all the pieces together.

I will be posting some pictures of different stages as I am moving towards the completion of the first build.

I hope you will all enjoy it.

The Victim

2006 YZ250 2-Stroke

The Objective

To update and make something that's good even better.

Updates will include the following:

* All new Aesthetics
* Engine Relocation
* Both Front and Rear Suspension Mods
* Chassis/Frame Modifications
* Upgraded Plastics
* New Graphics
* Loose 5-7lbs of original weight
* Engine Mods
* Newly designed sub frame
* Custom Exhaust System
* And more........to keep it interesting.

I will update with pictures and write up's as mentioned but It won't be on a daily basis rather a weekly kind of thing so please have patience as I don't work on it all day every day.

I know this is not too exciting yet but they all start off looking like this.

One thing I can promise is that when I'm done with her she will be one of a kind.

« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline Charles Owens

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Project: YZ250R
« Reply #1 on: October 07, 2012, 04:27:43 AM »
Sounds like an interesting project, welcome to the site!
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline citabjockey

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Project: YZ250R
« Reply #2 on: October 07, 2012, 04:42:06 AM »
Fuel injection perhaps?   

Going to be watching this thread.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
Yamaha CT3, RT3, MX125, SC500, Toy Prius, Diesel F250 (it all balances out)

Offline TMKIWI

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Project: YZ250R
« Reply #3 on: October 07, 2012, 05:57:08 AM »
Some interesting idea's.
" engine relocation" ? like to see how and why.
Will watch with interest. :)
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
If you don't fall off you are not going hard enough

Offline scotty dog

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Project: YZ250R
« Reply #4 on: October 07, 2012, 12:16:04 PM »
Very interesting, looking forward to seein the finished product
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
F**K THE WHALES......................SAVE THE 2 STROKE!!!!

The hardest part about riding a 4 stroke is telling your parents your Gay!!

05 CR 250

Offline Jeram

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Project: YZ250R
« Reply #5 on: October 07, 2012, 01:24:18 PM »
very nice.

question: if the engine relocation has to do with the counter shaft postion wouldnt it be simpler to modify the frame to accept an adjustable swing arm pivot height system that allows changes by swaping inserts, or an eccentric rotating system?

That way you dont have to guess where it needs to be for all scenarios, you can tune it to find the optimum position for each track
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline cnrcpla

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Project: YZ250R
« Reply #6 on: October 07, 2012, 05:12:32 PM »
Cool project  :o I can't wait to see the progress  :) If your moving the engine I think fuel injection would be a good option because it might fit better (depending on where the engine is going  :- )
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline Logan Dewey

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Project: YZ250R
« Reply #7 on: October 07, 2012, 05:50:39 PM »
sounds like fun
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline factoryX

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Project: YZ250R
« Reply #8 on: October 07, 2012, 07:37:27 PM »
Lower the engine and gas tank down to lower the center of gravity would by far be the most beneficial by making the bike feel even lighter. Lets take a step back in time and look at honda:
 
« Last Edit: December 31, 1969, 04:00:00 PM by ' »


I ride an 03 yz250, wait 04, wait 05, what ever, they're all the same #$@% YOU!

Offline Uniflow

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Project: YZ250R
« Reply #9 on: October 07, 2012, 08:29:42 PM »
Are you planing to cut the frame?
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline _X_

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Project: YZ250R
« Reply #10 on: October 07, 2012, 10:05:56 PM »
relocate the engine to the back of the bike like a top fuel dragsta!
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline citabjockey

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Project: YZ250R
« Reply #11 on: October 08, 2012, 02:44:54 AM »
Lower the CG? swap the locations of the airbox and the gas tank

 

Lower the engine and gas tank down to lower the center of gravity would by far be the most beneficial by making the bike feel even lighter. Lets take a step back in time and look at honda:
 
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
Yamaha CT3, RT3, MX125, SC500, Toy Prius, Diesel F250 (it all balances out)

Offline factoryX

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Project: YZ250R
« Reply #12 on: October 08, 2012, 03:09:55 AM »
Yamaha Tri-Z style
« Last Edit: December 31, 1969, 04:00:00 PM by ' »


I ride an 03 yz250, wait 04, wait 05, what ever, they're all the same #$@% YOU!

Offline TCI Performance

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Project: YZ250R
« Reply #13 on: October 08, 2012, 04:28:18 AM »
Thanks for showing all the interest in this build. I will try to answer most of the questions with one reply. However some of it I will not address in detail or at all at this point as I would like to keep it interesting and not give away too much.

* Fuel injection is on the list but most likely will not be released into the first build as I want to test the carburetor version first.
* The main and sub frame will and have been cut and modified to accept numerous changes for the pipe, engine, radiators and air box.
* Lower CG will be achieved with the changes mentioned above.

The bike has already been built back up with the mock up modifications in order to assure proper fit, form and function and I am now in process of manufacturing the actual pieces and other required parts in order to weld up the main and sub frame. After that has been done the frame will be properly processed and once I get the frame back it will go pretty quick to build it up as everything should just bolt on. Assuming everything goes by plan I should be able to release the first finished pictures by this month end with test rides and write up's to follow.

Can't wait for it to be done and share it with everyone.
« Last Edit: December 31, 1969, 04:00:00 PM by ' »

Offline TMKIWI

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Project: YZ250R
« Reply #14 on: October 08, 2012, 06:13:39 AM »
* The main and sub frame will and have been cut and modified to accept numerous changes for the pipe, engine, radiators and air box.

You turning the cylinder around , aren't you. ;)
« Last Edit: December 31, 1969, 04:00:00 PM by ' »
If you don't fall off you are not going hard enough