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General Two Stroke Talk / Project: YZ250R
« on: January 20, 2013, 04:05:43 AM »
Action shots and video are coming soon.
News:
Like the Phoenix rising from the ashes Two Stroke Motocross is reborn!
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General Two Stroke Talk / Project: YZ250R
« on: January 18, 2013, 04:47:32 PM »
Below is a link for some pictures from our photo shoot.
http://www.motovationsports.com/2013/01/18/tci-performance/
Thank you Steve Emter of Motovation Sports
http://www.motovationsports.com/2013/01/18/tci-performance/
Thank you Steve Emter of Motovation Sports
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General Two Stroke Talk / Project: YZ250R
« on: January 18, 2013, 04:19:37 PM »
Dyno Run Update
We have been testing the bike on the track the last couple of weeks and were noticing that the main difference between the stock carb and ATP SmartCarb was that we could keep the bike in gear longer.We felt that it would still pull hard when we would had to shift with the stock setup. Even though the stock carb comes on quicker we had absolutely no problem pulling out of the corners with a smooth power delivery which made it more like a 4-stroke type power but then pulled very strong up close to the 9K rpm range . Also we have noticed that we are using less fuel with the SmartCarb over stock. We haven't measured exact values as of yet but will in the next few test sessions.
The below Dyno run confirms what we felt.
PLEASE NOT THAT THIS DYNO RUN WAS NOT DONE TO SHOW HOW MUCH PEAK HP OR TORQUE THE ENGINE PRODUCES BUT RATHER THE PURE DIFFERENCE BETWEEN A PROPERLY TUNED STOCK AND ATP SMARTCARB BACK TO BACK WITH THE SAME BIKE SETUP.
Blue = 38mm SmartCarb
Red = Stock 38mm PWK
Thank you to Crower Performance for conducting the test for us.
In the next few weeks we will do more track testing to fine tune the suspension and have a few pro level as well as intermediate level riders give some feedback on the entire bike.
So far we have been very pleased with the bike and it is time to let independent guys and magazines test it for additional feedback.
We are planning on running the bike in a few selected races like the 2-Stroke Nationals and so on.
We have been testing the bike on the track the last couple of weeks and were noticing that the main difference between the stock carb and ATP SmartCarb was that we could keep the bike in gear longer.We felt that it would still pull hard when we would had to shift with the stock setup. Even though the stock carb comes on quicker we had absolutely no problem pulling out of the corners with a smooth power delivery which made it more like a 4-stroke type power but then pulled very strong up close to the 9K rpm range . Also we have noticed that we are using less fuel with the SmartCarb over stock. We haven't measured exact values as of yet but will in the next few test sessions.
The below Dyno run confirms what we felt.
PLEASE NOT THAT THIS DYNO RUN WAS NOT DONE TO SHOW HOW MUCH PEAK HP OR TORQUE THE ENGINE PRODUCES BUT RATHER THE PURE DIFFERENCE BETWEEN A PROPERLY TUNED STOCK AND ATP SMARTCARB BACK TO BACK WITH THE SAME BIKE SETUP.
Blue = 38mm SmartCarb
Red = Stock 38mm PWK
Thank you to Crower Performance for conducting the test for us.
In the next few weeks we will do more track testing to fine tune the suspension and have a few pro level as well as intermediate level riders give some feedback on the entire bike.
So far we have been very pleased with the bike and it is time to let independent guys and magazines test it for additional feedback.
We are planning on running the bike in a few selected races like the 2-Stroke Nationals and so on.
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General Two Stroke Talk / Project: YZ250R
« on: January 14, 2013, 03:37:52 AM »I have read elsewhere that the apt carb will fill crankcase pronto with the bike on its side. Have you found this to be the case?
Bike looks great. Looking forwar to more test results. Is it being raced now?
So far we haven't had any problems with the carb filling up the crankcase and have only good things to report about the SmartCarb.
We had a few different riders take it for a first impression ride and they all felt the bike had very good power with great throttle response.
This week we will test the bike on the Dyno back to back against the stock PWK carb. This should confirm what we feel on the track so far.
A more detailed write up will follow after we complete the Dyno testing. The bike will be raced after we have the magazine tests behind us.
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General Two Stroke Talk / Project: YZ250R
« on: January 11, 2013, 05:18:08 PM »
DONE!!!! With the first few test session behind us the bike is working better than expected.
APT SmartCarb works awesome so far and we are heading onto the Dyno next week for data.
More info to follow within the next couple of weeks.
APT SmartCarb works awesome so far and we are heading onto the Dyno next week for data.
More info to follow within the next couple of weeks.
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General Two Stroke Talk / Project: YZ250R
« on: November 27, 2012, 03:18:25 PM »We use zippy ties for those things Ha Ha.
Hmmmm......remind me not to try one of your bikes LOL
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General Two Stroke Talk / Project: YZ250R
« on: November 27, 2012, 03:06:42 AM »
As soon as the bike is ready for them we have to current pro's lined up to do a "first impression" ride and more thereafter.
Just waiting to finish up some loose ends on the bike so we can get started with testing.
Just waiting to finish up some loose ends on the bike so we can get started with testing.
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General Two Stroke Talk / Project: YZ250R
« on: November 26, 2012, 06:03:34 AM »
T0 to T6 is correct. If properly done the distortion can be minimized if not eliminated. In our case we where prepared to plug and re-machine the critical features if needed but with a few tricks on prepping the frame prior to heat treat we where good to go without post machining afterwards.
In your case you didn't bother modifying or heat treating after modification?
I know of several guys that have built AF conversions and said that they don't heat treat afterwards. Some say they just weld small sections at a time thus preventing the frame from getting too hot. The fact is that when you weld a section of the frame you are bringing the material to melting temperature thus altering it's temper some. Because the frame is not kept at that temperature for a long period of time it will not get back to T0 but certainly loos some of it's strength which can cause stress fractures down the road followed by complete frame failures. Not a risk I'm willing to take.
In your case you didn't bother modifying or heat treating after modification?
I know of several guys that have built AF conversions and said that they don't heat treat afterwards. Some say they just weld small sections at a time thus preventing the frame from getting too hot. The fact is that when you weld a section of the frame you are bringing the material to melting temperature thus altering it's temper some. Because the frame is not kept at that temperature for a long period of time it will not get back to T0 but certainly loos some of it's strength which can cause stress fractures down the road followed by complete frame failures. Not a risk I'm willing to take.
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General Two Stroke Talk / 2013 Yamaha YZ250
« on: November 25, 2012, 04:24:25 AM »
It's very nice......just like the 2007 I have sitting in the shop but 6 years younger. One thing is for sure I'm very pleased that Yamaha keeps on making them.
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General Two Stroke Talk / Project: YZ250R
« on: November 25, 2012, 03:53:31 AM »
As said in the very beginning of my initial post there are two stages to this build. This is the 1st stage which will allows us to implement and test our chassis changes as well as a possible new intake system. The next stage will be where the "Technology" comes into play. That as mentioned as well will be the fuel injection system which we have started to work on already. This will be the more intense part of our project in order to get it to perform the way it needs too and therefore it will take some time to get it right. In the meantime we have built the platform which we will use to test out all the chassis and handling improvements we are aiming for. As with any development projects the details of what has been done or how it was accomplished will not be shared.........at least at this point. As far as the temper question on the alloy......not sure if you guys are questioning my knowledge on this subject, don't know the answer or are just curious. All I will say is that the frame has been properly processed to get it back to it's original strength (temper) where it was prior to welding. There are many theories about welding aluminum frames. Some say they don't need it some say it's made of 7000 Series AL so it self anneals and some say don't ride without heat treating it but there is only one correct answer. You better know your alloys and their properties and if you don't know what you're doing don't do it.
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General Two Stroke Talk / TSM 2005 KX 125 Budget Build
« on: November 20, 2012, 10:52:12 PM »
Looking good.......can't wait to see the finished product.
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General Two Stroke Talk / Project: YZ250R
« on: November 20, 2012, 10:51:01 PM »
Don't get me wrong....I agree with a lot of what he posted and therefore know he has good knowledge about this subject.
That's the reason I asked about some pictures of his own doings because I love seeing other peoples approaches. I am pretty new on here so I don't know if he has posted pictures in the past or not but if he did please post a link.
The problem is that some of them talk a good story but they can't back it up. Not saying that bearorso is that type of person especially since he sounds like someone that knows what he is talking about. But like I always say.....seeing is believing.
For me personally.......I applaud anyone trying to keep developing the 2-Strokes no matter if he is working out of a shed in the backyard or has a reputable company like myself.
Again our core business is not building bikes.....but it's the racing experience combined with the passion and knowledge that drives me personally to spend the time, effort and money to hopefully build the baddest looking most technologically advanced 2-Stroke to date. It's a dream of mine and I am going after it and nobody is going to change that.
That's the reason I asked about some pictures of his own doings because I love seeing other peoples approaches. I am pretty new on here so I don't know if he has posted pictures in the past or not but if he did please post a link.
The problem is that some of them talk a good story but they can't back it up. Not saying that bearorso is that type of person especially since he sounds like someone that knows what he is talking about. But like I always say.....seeing is believing.
For me personally.......I applaud anyone trying to keep developing the 2-Strokes no matter if he is working out of a shed in the backyard or has a reputable company like myself.
Again our core business is not building bikes.....but it's the racing experience combined with the passion and knowledge that drives me personally to spend the time, effort and money to hopefully build the baddest looking most technologically advanced 2-Stroke to date. It's a dream of mine and I am going after it and nobody is going to change that.
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General Two Stroke Talk / Project: YZ250R
« on: November 20, 2012, 05:16:52 PM »
Thank you Debbie Downer for you thorough evaluation of our build. Just to be clear we didn't want or was it our intention to build a full on one off works bike, we leave that up to people like yourself. Surely there are plenty of people out there building conversions........never said we where the first ones. However there is more to it than just throwing a motor into a different frame but I'm sure you are fully aware of that.
Can you send me or post up some pictures of your conversions so I can evaluate them also? I have only seen pictures of the MPS bikes and would like to see what others have come up with to compliment them on their efforts to continue the quest of modern 2-strokes.
Have a great day and thanks again for your in depth reply......oh and it's TCI not TCR.
Can you send me or post up some pictures of your conversions so I can evaluate them also? I have only seen pictures of the MPS bikes and would like to see what others have come up with to compliment them on their efforts to continue the quest of modern 2-strokes.
Have a great day and thanks again for your in depth reply......oh and it's TCI not TCR.
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General Two Stroke Talk / Project: YZ250R
« on: November 20, 2012, 05:29:13 AM »What size rear tire is on it? And what size rim?
110/90-19 on a stock YZ250 rear wheel.
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General Two Stroke Talk / Project: YZ250R
« on: November 20, 2012, 01:30:15 AM »Nice.... Really nice. Where is the Smart Carb? Like the hydro clutch, but a little surprised you didn't try fitting a case slave. Great bike all in all.
I may have missed this part, but what is the purpose of this build? Replication/sales? Personal fun? I would be pretty into this bike as a choice...
Still waiting on the SmartCarb to arrive.
In short my passion of the sport and the 2 stroke is what started this project. That combined with my engineering knowledge and availability to produce pretty much anything I need within my company is what started it all. With all that in mind it was not started to sell units rather then develop something unique that can be ongoing. However I have been approached numerous times now about building them for people and I wouldn't mind once it is properly tested and performs to my standard. I am working with companies to see what can be done to get the components required in order to make this happen so that the bikes can be produced in whole or as a kit without costing an arm and a leg. That is and will be the challenge for now.
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