Bad WTF Crack
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- Posts: 73
- Joined: September 13th, 2007, 7:29 pm
Bad WTF Crack
Hey guys have any of you seen an AF frame crack at the head set / stearing stem??
If so why?
My tripple clamps where tight and she hadnt had any big crashs but she does have a worked bigpower motor which Ive run geared up for speed -15 / 38- maybe the frame flex stess is the cause?
The bike shops I showed said they hadnt seen a Honda alloy chassis crack like that before!
If so why?
My tripple clamps where tight and she hadnt had any big crashs but she does have a worked bigpower motor which Ive run geared up for speed -15 / 38- maybe the frame flex stess is the cause?
The bike shops I showed said they hadnt seen a Honda alloy chassis crack like that before!
I have been to the top of the mountain and yes it is good.
- dannygraves
- Posts: 8020
- Joined: June 1st, 2007, 2:03 pm
- Location: Las Vegas, NV
I've never seen that before, I'm going with the others on here with casting flaw unless your head bearings were way too tight, they should be just snug and seated, but not tight, like car wheel bearings, you crank it tight, then back off aroudn a 1/4 turan and back and forth to feel where it "seats"
'09 kx450f 4-Poke
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
- asteroid500
- Posts: 1047
- Joined: January 5th, 2009, 1:29 am
- Location: Australia Melbourne
I think it may of been repaired like this.
Step #1..find & locate crack, we used a chemical crack tester.
Step #2..drill a small hole strait threw the headstem to prevent further travel of the stress fracture.
Step#3..V or groove out the fracture to a debth were the Tig weld can penertrate deeply & build up the material required.
Step #4..We ran a tripple fillet weld on this frame as it is a mate of mine's, center, left, then right.
End result is a frame with its full structual integrity. ;D
Dont this frame look like the hammer in pink floydes, The Wall.....when it's been grooved out.
All this work was carryed out at Wereabout Engineering by Dave the Tig master and crazy Carl, in Darwin Australia. 8-)
Hey Scotty, were do i send my crank for balancing?
Step #1..find & locate crack, we used a chemical crack tester.
Step #2..drill a small hole strait threw the headstem to prevent further travel of the stress fracture.
Step#3..V or groove out the fracture to a debth were the Tig weld can penertrate deeply & build up the material required.
Step #4..We ran a tripple fillet weld on this frame as it is a mate of mine's, center, left, then right.
End result is a frame with its full structual integrity. ;D
Dont this frame look like the hammer in pink floydes, The Wall.....when it's been grooved out.
All this work was carryed out at Wereabout Engineering by Dave the Tig master and crazy Carl, in Darwin Australia. 8-)
Hey Scotty, were do i send my crank for balancing?
"not speeding officer".....qualifying
CR250 97
CR500 AF 99 (in progress)
CR500 AF CR G-4
CR500 1985 true legend
RGV250 96 X2
GSXR600 07 TRACK BIKE
VH Commadore cup car (race)
CR250 97
CR500 AF 99 (in progress)
CR500 AF CR G-4
CR500 1985 true legend
RGV250 96 X2
GSXR600 07 TRACK BIKE
VH Commadore cup car (race)
- asteroid500
- Posts: 1047
- Joined: January 5th, 2009, 1:29 am
- Location: Australia Melbourne
no,
the crack wasn't found strait away and had been riden hard so it was full off grit, requiring an acid wash to make sure no alloy spat on the mig
the crack wasn't found strait away and had been riden hard so it was full off grit, requiring an acid wash to make sure no alloy spat on the mig
"not speeding officer".....qualifying
CR250 97
CR500 AF 99 (in progress)
CR500 AF CR G-4
CR500 1985 true legend
RGV250 96 X2
GSXR600 07 TRACK BIKE
VH Commadore cup car (race)
CR250 97
CR500 AF 99 (in progress)
CR500 AF CR G-4
CR500 1985 true legend
RGV250 96 X2
GSXR600 07 TRACK BIKE
VH Commadore cup car (race)
- asteroid500
- Posts: 1047
- Joined: January 5th, 2009, 1:29 am
- Location: Australia Melbourne
The frame I got from ebay was crackd just like this (CRF450 2006). I already had the frame sitting in the garage for months waiting for completion when I discovered the crack and already left a good feedback to the seller so I just had it welded like asteroid did. The difference beeing that we left the bearing race in place to avoid any machining. So far so good.