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Old Jan 22, 2013, 10:35 AM
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Puerto Rico, Guayama, Guayama
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Hey,

This is a R/C motorcycle thread guys! Stop positing those nice and heart pumping videos, LOL.

Yesterday, I was jumping my MM450 through 6 feet high jumps. It's so cool to see the bike on the air so high and at 45+ degrees attitude!

David
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Old Jan 22, 2013, 04:22 PM
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Australia, QLD, Burua
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Originally Posted by Teamsherman View Post
That's no good about the injury mate, I sold my CR125 after a crash had me nearly paralysed over a big tabletop. I was super lucky that day.

On a nicer note, I can't get my 13t pinion to run freely, I think it might be binding with the frame that is on each side of the motor shaft. Anyone else have that problem and did you just dremel it down to fit??
Ouch, yea sorry Alan I forgot to mention making a little clearance for the pinion.
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Old Jan 22, 2013, 04:23 PM
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Originally Posted by Throttlejunkie View Post
mate, now that's a real bike gotta love the 2 stroke it is like music to the ears.
Exactly my thoughts Chris, beautiful music .
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Old Jan 22, 2013, 04:26 PM
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Originally Posted by davehour View Post
Hey,

This is a R/C motorcycle thread guys! Stop positing those nice and heart pumping videos, LOL.

Yesterday, I was jumping my MM450 through 6 feet high jumps. It's so cool to see the bike on the air so high and at 45+ degrees attitude!

David
Cool David, I hope you have some spares in case something goes wrong on one of those big jumps David . Have fun.
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Old Jan 22, 2013, 05:16 PM
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Originally Posted by chktm View Post
Cool David, I hope you have some spares in case something goes wrong on one of those big jumps David . Have fun.
Chris,

Actually, I was thinking about that because I don't have any at the moment. I had to put that new big bore to work after costing me that much, LOL.

Do you think the bike will break even landing the correct way?

What height will be ok to jump without risking the bike?

David
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Old Jan 22, 2013, 06:47 PM
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Australia, NSW, Picnic Point
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Originally Posted by Throttlejunkie View Post
Cool vids mate, i like your quadcopter you will definitely have to come for a bash & bring that & get some footage from the air
Just let me know when you're free, I'll try and get my mate Paul and his S800 commercial grade Hexacopter to come out so I can ride too!
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Old Jan 22, 2013, 07:20 PM
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Wheelie Bar

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Originally Posted by Gaz-b View Post
I have finally gotten around to joining the wheelie bar club some of you may recognise it as a raptor belt guide it will be having o rings stretched over it as a tyre .
Nice wheelie bar! What thickness is the graphite and how does it stand up during use?
Regards,
Nachi
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Old Jan 22, 2013, 07:29 PM
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Originally Posted by Nachiappan View Post
Nice wheelie bar! What thickness is the graphite and how does it stand up during use?
Regards,
Nachi
The sheet is 2mm and it seems quite industrial.
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Old Jan 22, 2013, 07:59 PM
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Waterford, Michigan
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Originally Posted by davehour View Post
Chris,

Actually, I was thinking about that because I don't have any at the moment. I had to put that new big bore to work after costing me that much, LOL.

Do you think the bike will break even landing the correct way?

What height will be ok to jump without risking the bike?

David
I bet if you keep the jumps very scale like the bike won't break often at all. If you jump higher than 24" , ya better have a down ramp to land on to ease the impact. Another thing to think about is that when a component breaks, is, how many times have you stressed that part? Those impacts accumulate on a part and just when ya think it'll never break it does. That's why top fuel dragsters get a complete rebuild between runs even if they didn't break on the previous run! I have a very well to do buddy that developed titanium valve springs for the drag racing groups. In that development, he studied how many times he could compress his springs before they broke and determined how many runs the engine could take at 10,000 rpm. That way the car owners could run a certain amount of runs before they had to change out the valve springs saving them tons of money. Even tho' the titanium springs were $1800 a set!!
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Old Jan 22, 2013, 08:25 PM
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Fatigue http://en.wikipedia.org/wiki/Fatigue_limit

Although not a consideration in RC MX bikes per se, resonance http://en.wikipedia.org/wiki/Resonance can cause premature fatigue.

Both of those covers valve springs, and almost anything you care to mention. Resonate (squeeze and release) almost any material at the right frequency and 'pop'. The ''glass shattering by the opera singer'' quote is one example. Interesting to note that at the point where the material resonates, material strength drops off significantly. ( Thank you mis spent youth watching late 1970's Open University programmes on BBC2).

OT message ends.
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Old Jan 22, 2013, 08:54 PM
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Guys,

Thanks for your recommendations. You bet I"ll keep them in my mind as I don't want to trash the bike. I'm planning on ordering a portable skateboard ramp. It's profile will let me practice back-flips at a moderate altitude. Chris's back-flips are amazing!

David
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Old Jan 22, 2013, 09:50 PM
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Since people are posting personal motorcycle videos, I figure I will share some pics of a few of the other miniature bikes I have built. All California street-legal minis. I'll be building another this spring.

Mini bikes rule.
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Old Jan 22, 2013, 10:23 PM
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Sydney, Australia
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Originally Posted by wannabe View Post
Since people are posting personal motorcycle videos, I figure I will share some pics of a few of the other miniature bikes I have built. All California street-legal minis. I'll be building another this spring.

Mini bikes rule.
Nice
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Old Jan 22, 2013, 10:36 PM
If u aint 1st your last
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Originally Posted by Teamsherman View Post
Just let me know when you're free, I'll try and get my mate Paul and his S800 commercial grade Hexacopter to come out so I can ride too!
my lipo's came today so i am free anytime that is good for you mate.
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Old Jan 22, 2013, 11:44 PM
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Australia, NSW, Picnic Point
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Originally Posted by wannabe View Post
Since people are posting personal motorcycle videos, I figure I will share some pics of a few of the other miniature bikes I have built. All California street-legal minis. I'll be building another this spring.

Mini bikes rule.
I love that Monkey R-75 mate, very cool looking little one!!

Quote:
Originally Posted by Throttlejunkie View Post
my lipo's came today so i am free anytime that is good for you mate.
Sweet, ive also got 6 lipos for mine that i havent even broken in yet!!! Are you free any weekdays or will just weekends be the go?
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