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Old 02-21-2011, 10:59 PM   #7501
Garthe
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Quote:
Originally Posted by header View Post
Istzephyr beat you to it. Ive already got the fittings so all I needed was the tubing.

.
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Old 02-21-2011, 11:33 PM   #7502
the_hulkamaniac
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Big Dead Piggy.



I was just messing around, it's a bit small. No room for the air intake track, but the pipe might fit within the frame.













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Old 02-22-2011, 12:06 AM   #7503
jesusgatos
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Ah, sorry to hear/see that. Any idea what happened? Besides the obvious...
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Old 02-22-2011, 04:29 AM   #7504
dirtyoffroad
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Quote:
Originally Posted by Garthe View Post
I got a complete kit I'm not using...$40.00 and it yours...shipping included. pm me your address...
if Header is all set Garthe,I'd be interested in that.
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Old 02-22-2011, 08:41 AM   #7505
the_hulkamaniac
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Originally Posted by jesusgatos View Post
Ah, sorry to hear/see that. Any idea what happened? Besides the obvious...
Not really, valves were adjusted around x-mas, fluids were fresh and full. It wasn't very cold out. -5C / 23F. Light snow in the past few days so I was pushing quite hard, it wouldn't wind out 5th so I was running in 4th really hard. So I might have just over reved it for to long with to much load. With this monster on the back end:

http://www.advrider.com/forums/showp...postcount=6935

So I might be giving up on the "terrorflex". Lucky for me i still have the oem motor, so I can run it until a rebuild the monster.

Anyone hear how cyclewiz is coming with his setup? I think the crank is good, but I need a big piston, cam, top end, valves....
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Old 02-22-2011, 08:54 AM   #7506
Purcell69
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Quote:
Originally Posted by the_hulkamaniac View Post
Not really, valves were adjusted around x-mas, fluids were fresh and full. It wasn't very cold out. -5C / 23F. Light snow in the past few days so I was pushing quite hard, it wouldn't wind out 5th so I was running in 4th really hard.
Was the valve head missing when you disassembled the motor? Something metal was hitting the top of the piston and the head. Just guessing, but I think when whatever let go at high rpm, it cocked the piston sideways, cracking the cylinder. I hate to say it, but I'd bet you're looking at a crank and rod plus a new top end at the least. That kind of load hitting the rod surely damaged the lower rotating assembly.

My wife did that one years ago with a 454 Chevy. The #3 exhaust valve dropped the head into the cylinder. Since steel doesn't compress well, the connecting rod took on an "s" shape before punching a hole in the side of the block. The damage in your pictures looks very similar.

-Joe
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Old 02-22-2011, 09:01 AM   #7507
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Originally Posted by dirtyoffroad View Post
if Header is all set Garthe,I'd be interested in that.
Sorry...sold.
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Old 02-22-2011, 10:45 PM   #7508
the_hulkamaniac
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Quote:
Originally Posted by Purcell69 View Post
Was the valve head missing when you disassembled the motor? Something metal was hitting the top of the piston and the head. Just guessing, but I think when whatever let go at high rpm, it cocked the piston sideways, cracking the cylinder. I hate to say it, but I'd bet you're looking at a crank and rod plus a new top end at the least. That kind of load hitting the rod surely damaged the lower rotating assembly.

My wife did that one years ago with a 454 Chevy. The #3 exhaust valve dropped the head into the cylinder. Since steel doesn't compress well, the connecting rod took on an "s" shape before punching a hole in the side of the block. The damage in your pictures looks very similar.

-Joe
I think I fished out all the parts, they were sitting on top of the piston. The piston had no problem going up and down in the bore once free. One of my neighbors used to build motors and crank he's going to give mine a once over looks straight feels tight. Time will tell. There is a bunch of room for a broken valve to bounce around with the high peak in the cylinder head.

My old 450s, and I blew up a few would grenade much worse then this.
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Old 02-22-2011, 11:00 PM   #7509
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Needle Jet install question

Prior to reading the "make note of how your needle jet is oriented when you pull it out, it'll save you jetting headaches later" advice, I pulled it and cleaned it.

The XRR manual says to reinstall it with the smaller diameter into the carb body.

Do they mean inner or outer diameter?
-The outer diameter difference is 0.2mm,
Inner is a 1.0mm difference.
Of course the smaller inner diameter is on the larger outer diameter side.

Which way should this go back in??
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Old 02-22-2011, 11:18 PM   #7510
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Old 02-23-2011, 12:57 AM   #7511
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[QUOTE=5hortbus;15257623]Prior to reading the "make note of how your needle jet is oriented when you pull it out, it'll save you jetting headaches later" advice, I pulled it and cleaned it.

The XRR manual says to reinstall it with the smaller diameter into the carb body.

Do they mean inner or outer diameter?
-The outer diameter difference is 0.2mm,
Inner is a 1.0mm difference.
Of course the smaller inner diameter is on the larger outer diameter side.

Which way should this go back in??

The end with a smaller outer diameter goes in first.
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Old 02-23-2011, 01:21 AM   #7512
Purcell69
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Does anyone know if a XR400 rear wheel can be fitted to the XR650R? I know the CRF450X can be done with a different bearing set and a little shaving of the axle spacers. I'm looking for a spare rear but even used is damn expensive. I even looked into the Warp 9's, but the reviews were mixed. Didn't seem all that good for the money.

-Joe
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Old 02-23-2011, 04:13 AM   #7513
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Quote:
Originally Posted by larryboy View Post
Why don't you put in a sight tube? I'd forget to check the oil all the time until I put in a sight tube, can even be checked at idle now.

hope I didn't miss it, but do you have pics of this? Thanks
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Old 02-23-2011, 06:20 AM   #7514
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the_hulkamaniac, did it have any aftermarket engine parts or internal motor work? XR400R CDI? Its rather odd for it to eat an exahust valve (unless its too tight, in which case it'll get way hot and die early) as the intake is so much bigger it'd usually break off first.
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Old 02-23-2011, 09:20 AM   #7515
5hortbus
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Thanks- Now Playing Carb XRR russsian roulette

Appreciate the help JM.

Was psyched to get it back together, and needless to say, that was a roadblock to the process.

I have also completed the Borynack "cuz I'm in here" carb mods of plugging the Air Jet Cutoff Valve, and removing the choke flap.

Is there anything I need to be worried about moving forward?
I'm at about 700'
-68s Pilot
-175 Main
-B53e needle (3rd Clip position)

-From what the PO told me, I have a Big Gun header and Pipe. Other uncorking has been completed. The airbox is still in its original form.

Previously, the bike bogged on accel and had a stumble a few seconds into WOT.

I have read carb tuning threads ad nauseum, but this is my first time tinkering with what may as well be the human brain to me. So if there's anything glaring, let me know.

Oh, one other thing: The pilot screw spring, o-ring, and washer wouldn't come out of the carb when I disassembled. Reason for concern? The screw came out, but everything else stayed put.
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