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Old 03-10-2011, 02:17 PM   #1 (permalink)
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Question 400ex engine re-assembly

I ended up having to pull the head off my 400ex and was wondering what the torque specs are for the head bolts, and what order do you torque them in. I don't want to buy the clymers if I don't have to and I have built quite a few different motors. Thanks!
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Old 03-10-2011, 03:07 PM   #2 (permalink)
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im unsure as to what the specs are but a quick google search usually helps a ton. or call a local honda shop they will tell ya
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Old 03-10-2011, 03:26 PM   #3 (permalink)
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Head bolts torque at 33 ft-lbs. and are tightened in a crisscross pattern in 2 or 3 steps.
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Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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Old 03-10-2011, 07:52 PM   #4 (permalink)
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Right on helmut thank you very much! And the google thing I would go there but is the info trustworthy enough for a very precise and needed answer. I know where to go and who I can trust on here. Helmut always has the answers lol. But thanks fellas either way!
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07 416ex
Wiseco 11:1 87mm piston
Stage 2 magnum cam
Kibble white +1mm valves (high rev springs)
P@P
Crf450 t-chain
Cometic gaskets
Gt thunder hd studs
EBC Dirt Racer Clutch
PRM skid
Hmf slip-on-dg header
UNI filter with ehs powerlid
45 pilot, 1 3/4 turns, middle clip, 188 main
razr XC tires
Team Alba (bumper,nerfs,beadlocks,+2 lt arms)
Mod quad dash
Acerbies handguards
Msr ez pull lever
Oury grips
Pro taper fat bars
TCS triple rate front shocks
PEP rear shock
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Old 03-10-2011, 09:32 PM   #5 (permalink)
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Quote:
Originally Posted by SlammedRanger View Post
Right on helmut thank you very much! And the google thing I would go there but is the info trustworthy enough for a very precise and needed answer. I know where to go and who I can trust on here. Helmut always has the answers lol. But thanks fellas either way!
You're welcome. Yeah, I got the info from the service manual, so it should be accurate.
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Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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Old 03-10-2011, 09:37 PM   #6 (permalink)
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I wouldn't doubt any answer from u helmut. Google is a different story lol. Just my opinion of course. And heck I trust the fsm more than a clymers even. Thanks again!
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07 416ex
Wiseco 11:1 87mm piston
Stage 2 magnum cam
Kibble white +1mm valves (high rev springs)
P@P
Crf450 t-chain
Cometic gaskets
Gt thunder hd studs
EBC Dirt Racer Clutch
PRM skid
Hmf slip-on-dg header
UNI filter with ehs powerlid
45 pilot, 1 3/4 turns, middle clip, 188 main
razr XC tires
Team Alba (bumper,nerfs,beadlocks,+2 lt arms)
Mod quad dash
Acerbies handguards
Msr ez pull lever
Oury grips
Pro taper fat bars
TCS triple rate front shocks
PEP rear shock
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Old 03-10-2011, 09:43 PM   #7 (permalink)
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You're welcome.
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Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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Old 03-10-2011, 09:45 PM   #8 (permalink)
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When you do torque them set your wrench to half the total value and work your way to the max torque, you will get a more even seal.
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Old 03-10-2011, 09:57 PM   #9 (permalink)
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Awesome good info thanks! I ordered a namura topend gasket kit so its gunna have a new head gasket. do you have to put anything on the head gasket? It looks like there was some sort of sealer on it when I pulled it off. And i am certain I'm the first one pulling this motor apart so it wasn't something someone did.
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07 416ex
Wiseco 11:1 87mm piston
Stage 2 magnum cam
Kibble white +1mm valves (high rev springs)
P@P
Crf450 t-chain
Cometic gaskets
Gt thunder hd studs
EBC Dirt Racer Clutch
PRM skid
Hmf slip-on-dg header
UNI filter with ehs powerlid
45 pilot, 1 3/4 turns, middle clip, 188 main
razr XC tires
Team Alba (bumper,nerfs,beadlocks,+2 lt arms)
Mod quad dash
Acerbies handguards
Msr ez pull lever
Oury grips
Pro taper fat bars
TCS triple rate front shocks
PEP rear shock
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Old 03-10-2011, 10:06 PM   #10 (permalink)
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No, you don't need to put anything on the head gasket.
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Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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