[Racer X]

Maxton is this weekend .The weather is looking too good. The HOT ROD Magazine fastest street car shoot out is going to go on also .With 70 cars and 45 bikes .It should be fun.

I will run the new yellow bike hoping to better my 110 top speed. I will also try to post up videos and photos from the track.

for info www.ecta-lsr.comhttp://http:// Come on out and watch 5 dollars all weekend is a bergen .

 

[Blue Ghost]

Re: Maxton April 2010

Are you racing both days?

 

[Felix]

Re: Maxton April 2010

Yeah Yeah!

Can't wait man! GOOD LUCK! If I was within 500km i'd come watch

Felix



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[Racer X]

Re: Maxton April 2010

Yes I hope to run all day Saturday .Then try to go faster Sunday.

 

[Blue Ghost]

Re: Maxton April 2010

Is there a particular time bikes run or is it just random?

 

[Racer X]

Re: Maxton April 2010

there are three lines that form at the start. One at a time they let us go. So it is randome

 

[Blue Ghost]

Re: Maxton April 2010

I was just curious. When you ran your 110, what size tire did you have on the bike and at what rpm? what do you run now? I remember you had done nothing to the engine yet.
I know this is probably too late or may not be even relevant, but I was doing a little research, speed based on rear wheel size & final drive. I understand the significance of decreasing rolling mass and resistance, but what if you are too small? Correct me if Im off. You increased HP but work harder for revolutions per mile.

Here is what I came up with...
if you run a 15/42 set up

a 130/40/17 tire circumference is (66.27) @ 12700 rpm the mathematical speed should be 103.40 mph . (100.99 mph w 15/43)

..140/60/17 (74.19)@ 12700 rpm=115.76 (113.06 mph w/ 15/43)

...130/70/17(75.92)@ 12700 rpm= 118.59 (115.70 mph w/ 15/43)

Do you think anything can be gained with the extra HP and slightly larger tire size?


from the online tire size calculator


from the online tire size calculator

 

[Racer X]

Re: Maxton April 2010

The resr tire is just the thr last gear of your overall gear ratio. I was stock tires and a 15/43 gear. My 110 run was done with a tail wind. The wind makes that much difference. I was able to hit 12700 rpm .That is only like 500rpm over a 105 run

 

[Blue Ghost]

Re: Maxton April 2010

Sorry, forgot to mention all the figures are based on 6th gear as the final ratio. redid the figures based on 12700 rpm. does help you any? there should be no wind this morning till about 10am. when it comes it should be SSW. Gust up to 14. Help is on the way!

 

[Racer X]

Re: Maxton April 2010

It never went to a tail wind.I was leaning over trying to go in a straight line. But 109.7 is very good

 

[Racer X]

Re: Maxton April 2010

I ran the numbers last night . 107mph with a 15/43 gearing and slicks that are 23.9 inch tall .The Rpm was 11875. The 109 mph run was an rpm of 12186. the difference of 311 rpm. Not much . It is amazing how I am scratching for 50 or 100 Rpm to up my personal best.

This is a video from Saturday. My new friend Joel with the stock 250 brought his teenage son .He shot this video for me . I don't recall his name but I want to thank his,I love the commentary at the end

Dark Horse Racing at Maxton

 

[Blue Ghost]

Re: Maxton April 2010

I missed you going by with my camera. That was cool.

 

[Delta107]

Re: Maxton April 2010

"Black Dot and he is gone" lol

 

[spooph]

Re: Maxton April 2010

awesome! I love the sound too!

 

[Racer X]

Re: Maxton April 2010

"Black Dot and he is gone" lol

I just love that.

 

[Felix]

Re: Maxton April 2010

Love it! Like a dot, and he's gone!

Felix



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[Racer X]

Re: Maxton April 2010

This is the fastest 250 four stroke in the altered catagory. It is my good friend Jarl.W .He built the bike himself. It is a 1998 125 honda road race frame.With a 2005 Honda dirt bike single cylinder four stroke engine stuffed inside .He has been working on it since 2008 .We hang out and help each other at the track.
He made the fairing this winter and it paid off .He went faster than the turbo 250 ninja. Bettering its record of 113 by going 115.Then removed the front fairing and went 112 mph .

Maxton Mile Apr 2010 Jarl Wathne's Honda CRSF250J 115.1mph

 

[Felix]

Re: Maxton April 2010

Nice, sounds nasty!

Looks like a 1950's streamliner! Mean pipes!

Felix



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[Racer X]

Re: Maxton April 2010

The new track record for a car was set at Maxton also 237!!!!!! Mph Mitsubishi EVO . Notice how it spins all four tires at mid track .That is around 190 mph. OOOOO
237 MPH! World's Fastest EVO!

 

[spooph]

Re: Maxton April 2010

that's crazy!