Aussie Ray Gen 4 / CRF450R 06
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- Posts: 125
- Joined: January 22nd, 2011, 1:10 am
- Location: Las Vegas
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- Joined: November 28th, 2009, 9:11 pm
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- Joined: January 22nd, 2011, 1:10 am
- Location: Las Vegas
- 2strokeforever
- Posts: 1524
- Joined: November 13th, 2009, 1:04 pm
- Location: Vernon B.C Canada
my completly unprofessional opinion
i think its mostly the headstay, (motor mounts could use help too) while it is built nicely, it dosent provide enough front to back stiffness.... it works on a 450 cause the headstays go straight down, on the billet ones they go in then down on a 90, not the way any other headstay works on anything....
just by looking at it you can see its gonna flex forwards to back real easy, even being billet
now look how honda does it, straight down, not in 4 inches then a 90
i think its mostly the headstay, (motor mounts could use help too) while it is built nicely, it dosent provide enough front to back stiffness.... it works on a 450 cause the headstays go straight down, on the billet ones they go in then down on a 90, not the way any other headstay works on anything....
just by looking at it you can see its gonna flex forwards to back real easy, even being billet
now look how honda does it, straight down, not in 4 inches then a 90
the 450 will have less power and will be harder to start, and will be heavier, but to make up for it it will require more maintenance.
4stroke=dead fish
4stroke=dead fish
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- Joined: July 4th, 2007, 6:57 pm
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- Joined: November 28th, 2009, 9:11 pm
The motor was only braced sideways when the first rails broke. We thought maybe headstays came loose. Which caused stay to brake and load frame rails with too much force. Rails held up fine for 6 months running standard engine. They broke on first outing with 80+hp engine.
When we rebuilt the the frame rails we braced it sideways and added an extra brace back to shocky tower. All bolts and nuts were installed with Lock Tight and closely monitored for loosening. The rails broke on second outing. The bike is used for beach racing only. It has not been jumped at all.
When we rebuilt the the frame rails we braced it sideways and added an extra brace back to shocky tower. All bolts and nuts were installed with Lock Tight and closely monitored for loosening. The rails broke on second outing. The bike is used for beach racing only. It has not been jumped at all.
- Gravel Scratcher
- Posts: 278
- Joined: September 20th, 2009, 8:45 pm
- Location: Australia, Central QLD
I'm not saying it is the cause but I can't help but wonder if bending the tube in T6 condition played a part in the breaks. I do think the mounts should have been wider as you already said. Props to you for showing the busted rails and those billets look bad ass! May have a break some where else but it ain't going to be on the rails.
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- Joined: February 22nd, 2008, 8:18 pm
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