Crank replacement help - Honda TRX Forums: Honda TRX 450R Forum

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Old 01-19-2011, 07:11 PM   #1 (permalink)
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Default Crank replacement help

My Hot Rod crank is seized where the rod bearing is.

I need help in getting the crank out. Does anyone have a guide? I have the full manual, but it is missing a lot of details and wants me to remove everything off the motor including the tranny.

Thanks in advance
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2005 Honda TRX 450R

FMF header, Yoshi pipe from a street bike
Hot Cam Stage 3
Dyno Jet (Jet kit)
K&N Air Filter
HID headlight
Rear Sand Paddels and SS Rims
Front ITP Rims
ESR Temp Guage
Ported and polished head with a valve angle job
3+mm strocker crank
13t front sprocket, 39t rear sprocket
JE piston 11.5 comp ratio
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Old 01-19-2011, 08:16 PM   #2 (permalink)
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take pics as u go and lots of ziploc baggies and a sharpie for labeling youll be fine
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Old 01-19-2011, 08:23 PM   #3 (permalink)
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someone should make a youtube video of this.Can you think of the hits it would get
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Old 01-19-2011, 08:36 PM   #4 (permalink)
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you have to split the whole motor to get it out. and the trans is included. when you go to split the center cases lean it to the right side (Tanny Side) so all the trans gears wont drop out..
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Old 01-19-2011, 08:51 PM   #5 (permalink)
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I am actually stuck at the part where you pull the clutch and have the basket nut. I cant figure out how to get it out. Also the flywheel is the same story.

I would bet it would get a ton of hits because this seems to be such a common issue. my crank seems to spin freely the only thing that is seized is the rod bearing.
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2005 Honda TRX 450R

FMF header, Yoshi pipe from a street bike
Hot Cam Stage 3
Dyno Jet (Jet kit)
K&N Air Filter
HID headlight
Rear Sand Paddels and SS Rims
Front ITP Rims
ESR Temp Guage
Ported and polished head with a valve angle job
3+mm strocker crank
13t front sprocket, 39t rear sprocket
JE piston 11.5 comp ratio
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Old 01-19-2011, 08:59 PM   #6 (permalink)
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maybe just get it as far as you can and take it to a honda dealer it would save you money in the long run to have it done right the first time!
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Old 01-19-2011, 09:05 PM   #7 (permalink)
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I wanted to do it myself. A guy is asking me 350 to swap out the old crank for the new one. When my stock honda crank failed I replaced it with the stroker. Probably about a year ago. I took it to someone who charged me for the process as well and a year later I am in the same boat.

Someone said to put it in gear but the clutch basket still moves.
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2005 Honda TRX 450R

FMF header, Yoshi pipe from a street bike
Hot Cam Stage 3
Dyno Jet (Jet kit)
K&N Air Filter
HID headlight
Rear Sand Paddels and SS Rims
Front ITP Rims
ESR Temp Guage
Ported and polished head with a valve angle job
3+mm strocker crank
13t front sprocket, 39t rear sprocket
JE piston 11.5 comp ratio
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Old 01-19-2011, 09:58 PM   #8 (permalink)
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best to use an impact but i have held the inner hub with ratchet strap or even better a big oil filter wrench.. and youll need a flywheel puller to get it off and the balancer socket (4) prong socket..
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Old 01-19-2011, 10:15 PM   #9 (permalink)
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I have head of using a rubber oil filter wrench for the flywheel. I think I am going to see how much this other guy charges since I almost have the motor apart. If it is cheaper than 200 ill do it if not ill just buy the 4 prong socket. The flywheel puller and install tool for putting the bearing back into the crank.
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2005 Honda TRX 450R

FMF header, Yoshi pipe from a street bike
Hot Cam Stage 3
Dyno Jet (Jet kit)
K&N Air Filter
HID headlight
Rear Sand Paddels and SS Rims
Front ITP Rims
ESR Temp Guage
Ported and polished head with a valve angle job
3+mm strocker crank
13t front sprocket, 39t rear sprocket
JE piston 11.5 comp ratio
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Old 01-22-2011, 08:54 PM   #10 (permalink)
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Would an 06 Left case fit mine or will I have to get an 04-05 case?
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2005 Honda TRX 450R

FMF header, Yoshi pipe from a street bike
Hot Cam Stage 3
Dyno Jet (Jet kit)
K&N Air Filter
HID headlight
Rear Sand Paddels and SS Rims
Front ITP Rims
ESR Temp Guage
Ported and polished head with a valve angle job
3+mm strocker crank
13t front sprocket, 39t rear sprocket
JE piston 11.5 comp ratio
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Old 01-22-2011, 09:46 PM   #11 (permalink)
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No the 06 case will not work.

No offense, but if you are having trouble pulling the flywheel and clutch basket then I would stop and take it to somebody.
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Old 01-22-2011, 10:40 PM   #12 (permalink)
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I am not having trouble with anything. Dont worry no offense taken, I just dont want to break anything and have to deal with making or using different tools to get the job done. I bought and bearing puller and had some legs I was able to slip behind the flywheel and got it off.

Do you think that overheating can cause the crank to lock and make the chain jump timing and cause what you see in the pic below?


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2005 Honda TRX 450R

FMF header, Yoshi pipe from a street bike
Hot Cam Stage 3
Dyno Jet (Jet kit)
K&N Air Filter
HID headlight
Rear Sand Paddels and SS Rims
Front ITP Rims
ESR Temp Guage
Ported and polished head with a valve angle job
3+mm strocker crank
13t front sprocket, 39t rear sprocket
JE piston 11.5 comp ratio
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Old 01-22-2011, 10:42 PM   #13 (permalink)
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No.

That happened because somebody dropped the cam chain in the case and turned the crank over pretty hard.
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Old 01-22-2011, 10:53 PM   #14 (permalink)
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The bike was running really good. It bogged after long ride and then it came to normal. 2 min later it turned off completely and this is what I see so far. there is lots of metal shavings in the crank case.

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2005 Honda TRX 450R

FMF header, Yoshi pipe from a street bike
Hot Cam Stage 3
Dyno Jet (Jet kit)
K&N Air Filter
HID headlight
Rear Sand Paddels and SS Rims
Front ITP Rims
ESR Temp Guage
Ported and polished head with a valve angle job
3+mm strocker crank
13t front sprocket, 39t rear sprocket
JE piston 11.5 comp ratio
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Old 01-25-2011, 01:44 PM   #15 (permalink)
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I went to the local dealer and the guy said that the cases have to be purchased as a set because they are drilled at the same time and different cases wont align correctly.

I am waiting for a tech to look at it and tell me what i should do. The crank looks fine other that the seized up rod bearing.
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2005 Honda TRX 450R

FMF header, Yoshi pipe from a street bike
Hot Cam Stage 3
Dyno Jet (Jet kit)
K&N Air Filter
HID headlight
Rear Sand Paddels and SS Rims
Front ITP Rims
ESR Temp Guage
Ported and polished head with a valve angle job
3+mm strocker crank
13t front sprocket, 39t rear sprocket
JE piston 11.5 comp ratio
yginesta is offline   Reply With Quote
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