Bike repair

Chandler341
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Chandler341
Edited Date/Time 12/11/2015 3:21pm
I recently attempted to be Travis Pastrana and skim a shallow pond behind my house. Long story short, made it about 3/4 of the way and blew my foot off chopped the throttle and an endo ensued (dont ever take a bet from your little brother)

Anyways I flooded my bike really dont know where to start on the repair. It's a 2013 Honda CRF450. Any advice will help.
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colintrax
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colintrax 12/10/2015 7:21pm
12/10/2015 7:21pm
Pull the plug, drain water. Change oil. Does it run now? If not come back
Chandler341
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Chandler341 12/10/2015 7:23pm
12/10/2015 7:23pm
colintrax wrote:
Pull the plug, drain water. Change oil. Does it run now? If not come back
did this right after, could it be electrical?
BobPA
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BobPA 12/10/2015 7:23pm
12/10/2015 7:23pm
How recently?

Take the spark plug out and get the water out of the top end ASAP. Drain the oil and put in fresh. Drain the fuel. REALLY pay attention to get all the water out of the tank. Get it running and ride it into the bike reaches operating temperature. Drain the oil. Repeat until the oil is no longer milky.
Chandler341
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Chandler341 12/10/2015 7:27pm
12/10/2015 7:27pm
BobPA wrote:
How recently? Take the spark plug out and get the water out of the top end ASAP. Drain the oil and put in fresh. Drain the...
How recently?

Take the spark plug out and get the water out of the top end ASAP. Drain the oil and put in fresh. Drain the fuel. REALLY pay attention to get all the water out of the tank. Get it running and ride it into the bike reaches operating temperature. Drain the oil. Repeat until the oil is no longer milky.
did not drain the fuel, i will do that. when you try to start it it seems to not have any fire behind it. My mechanic skills are little to none other than changing oil and a tire. so any and all advice helps.

The Shop

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colintrax
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colintrax 12/10/2015 7:27pm
12/10/2015 7:27pm
colintrax wrote:
Pull the plug, drain water. Change oil. Does it run now? If not come back
Chandler341 wrote:
did this right after, could it be electrical?
Ok what's the bike doing? Could be electrical, could still be water in the gas, could be a bent rod. Need more info
Chandler341
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Chandler341 12/10/2015 7:31pm
12/10/2015 7:31pm
colintrax wrote:
Pull the plug, drain water. Change oil. Does it run now? If not come back
Chandler341 wrote:
did this right after, could it be electrical?
colintrax wrote:
Ok what's the bike doing? Could be electrical, could still be water in the gas, could be a bent rod. Need more info
Like i told the other guy i never drained the fuel, but when try to start it it kicks fine just doesn't want to fire. My mechanic skills are little to none so any advice or other things i could try are welcome.
colintrax
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colintrax 12/10/2015 7:37pm
12/10/2015 7:37pm
Chandler341 wrote:
did this right after, could it be electrical?
colintrax wrote:
Ok what's the bike doing? Could be electrical, could still be water in the gas, could be a bent rod. Need more info
Chandler341 wrote:
Like i told the other guy i never drained the fuel, but when try to start it it kicks fine just doesn't want to fire. My...
Like i told the other guy i never drained the fuel, but when try to start it it kicks fine just doesn't want to fire. My mechanic skills are little to none so any advice or other things i could try are welcome.
Drain the fuel, and start fresh first. Still not starting, check the spark. Easiest way is to pull the plug, ground it to the cylinder head and kick it over looking for a nice strong spark.
If you have spark, get a compression gauge and check your compression.
moto455va
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moto455va 12/10/2015 7:38pm
12/10/2015 7:38pm Edited Date/Time 12/10/2015 7:39pm
I put my bike in the water and ended up replacing the bottom and top end, the crank bearings and seals, and every gasket in the motor.
BobPA
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BobPA 12/10/2015 7:49pm
12/10/2015 7:49pm
moto455va wrote:
I put my bike in the water and ended up replacing the bottom and top end, the crank bearings and seals, and every gasket in the...
I put my bike in the water and ended up replacing the bottom and top end, the crank bearings and seals, and every gasket in the motor.
Why? As long as you get it out and running you're fine...
moto455va
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moto455va 12/10/2015 7:53pm
12/10/2015 7:53pm Edited Date/Time 12/10/2015 7:56pm
BobPA wrote:
Why? As long as you get it out and running you're fine...
I put the bike on a trailer as soon as it happened, didnt try to kick it over or anything. Brought it home, pulled the plug and the combustion chamber was filled with water.

Originally just replaced the rings/gaskets, drained the oil, ran about a gallon of oil through it with the drain plugs off, and put it back together and rode it.

The crank main seals let go after about 30 mins of riding on it like that and started pushing oil into the combustion chamber and back out the airbox, so I said screw it and redid the whole thing with all OEM parts. The main bearings had some rust coloring on them as well.

Works great now though.
motoman_578
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motoman_578 12/10/2015 11:42pm
12/10/2015 11:42pm
Drain out all the gas as well as draining the float bowl of the carb! If you don't drain the carb you will still be kicking with no fire. Drain both tranny and engin oil pull air filter clean dry and reoil squirt a little wd40 down spark plug hole with plug out and kick it a few times. Put in new plug new fresh gas and see what happens. Also befor trying to start it put new plug in plug wire ground it out on the head and see if it has sparked it doesn't start with the kill button first clean it with MAF sensor cleaner from local auto parts store. Try again still no spark needs a new Cdi but honestly you should be ok with just draining all the fluids and replacing and a small squirt of wd40
Chandler341
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Chandler341 12/11/2015 10:16am
12/11/2015 10:16am
Thanks for all the advice, will report back what happens
RailinRuts450 12/11/2015 1:41pm
12/11/2015 1:41pm
If the above drain gas, pull spark etc doesn't work, pull all the electrical connections and use some wd40 and spray em down good. Wd40 will displace any water in the connectors. Hook em back up. Don't forget about the air filter. I'd also check the intake tract to make sure nothing nasty like pond mud is laying in it.

When it does start pay close attention to the engine for vibrations or contact noises. You could have a bent rod or damaged bearings. Be best to pull it all apart before you window the cases/head/everything.

Do you have a separate oil compartment for the transmission? I think Hondas used to have that. Could be wrong... I've been on KTMs and Yamahas the past 5 years.

Make sure you keep changing your oil until it isn't milky. Change that oil filter as well.

If nothing after that I'd say check compression, valve adjustment etc.
mxtech1
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mxtech1 12/11/2015 2:40pm
12/11/2015 2:40pm
colintrax wrote:
Ok what's the bike doing? Could be electrical, could still be water in the gas, could be a bent rod. Need more info
Chandler341 wrote:
Like i told the other guy i never drained the fuel, but when try to start it it kicks fine just doesn't want to fire. My...
Like i told the other guy i never drained the fuel, but when try to start it it kicks fine just doesn't want to fire. My mechanic skills are little to none so any advice or other things i could try are welcome.
colintrax wrote:
Drain the fuel, and start fresh first. Still not starting, check the spark. Easiest way is to pull the plug, ground it to the cylinder head...
Drain the fuel, and start fresh first. Still not starting, check the spark. Easiest way is to pull the plug, ground it to the cylinder head and kick it over looking for a nice strong spark.
If you have spark, get a compression gauge and check your compression.
Wrong. The best way to check for spark is to firmly hold the spark plug boot in your hand while kicking it. Your hand insulates the plug and keeps it from jumping to anything metal.

The faster/harder you kick the better.
Spagina767
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Spagina767 12/11/2015 2:44pm
12/11/2015 2:44pm
You need to change air filter, clean air boot, clean throttle body, pull plug and turn bike upside down to drain water from motor. Change oil and change the fuel.

It should start.
Tpog496
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Tpog496 12/11/2015 2:53pm
12/11/2015 2:53pm
BobPA wrote:
Why? As long as you get it out and running you're fine...
This is far from true. My cousin swamped his KTM with 10 hrs on it we changed the oil like 5 times just to be safe and it locked up on the face of a triple the next time we went riding. Brought it to the dealership and they got KTM to replace the engine free of charge. No clue why they would do anything like that but they did.
colintrax
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colintrax 12/11/2015 3:13pm
12/11/2015 3:13pm
Chandler341 wrote:
Like i told the other guy i never drained the fuel, but when try to start it it kicks fine just doesn't want to fire. My...
Like i told the other guy i never drained the fuel, but when try to start it it kicks fine just doesn't want to fire. My mechanic skills are little to none so any advice or other things i could try are welcome.
colintrax wrote:
Drain the fuel, and start fresh first. Still not starting, check the spark. Easiest way is to pull the plug, ground it to the cylinder head...
Drain the fuel, and start fresh first. Still not starting, check the spark. Easiest way is to pull the plug, ground it to the cylinder head and kick it over looking for a nice strong spark.
If you have spark, get a compression gauge and check your compression.
mxtech1 wrote:
Wrong. The best way to check for spark is to firmly hold the spark plug boot in your hand while kicking it. Your hand insulates the...
Wrong. The best way to check for spark is to firmly hold the spark plug boot in your hand while kicking it. Your hand insulates the plug and keeps it from jumping to anything metal.

The faster/harder you kick the better.
Wtf are you talking about? There's no spark if the plug isn't grounded. That's why you touch the ground strap to the cylinder head (ground)

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BobPA
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BobPA 12/11/2015 3:19pm
12/11/2015 3:19pm
Tpog496 wrote:
This is far from true. My cousin swamped his KTM with 10 hrs on it we changed the oil like 5 times just to be safe...
This is far from true. My cousin swamped his KTM with 10 hrs on it we changed the oil like 5 times just to be safe and it locked up on the face of a triple the next time we went riding. Brought it to the dealership and they got KTM to replace the engine free of charge. No clue why they would do anything like that but they did.
This is not far from true, as long as you did not damage a rod or a valve the engine will be fine. My friend swamped his 250f Kawi, twice in 2 weeks and it never exploded. I unhydrolock jet ski engines all summer at our shop...and they are 4 cylinder 4 strokes (sea doos are 3), and as long as you get them running and burn the water off they are fine....after 4-5 oil changes that is.
BobPA
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BobPA 12/11/2015 3:20pm
12/11/2015 3:20pm
colintrax wrote:
Drain the fuel, and start fresh first. Still not starting, check the spark. Easiest way is to pull the plug, ground it to the cylinder head...
Drain the fuel, and start fresh first. Still not starting, check the spark. Easiest way is to pull the plug, ground it to the cylinder head and kick it over looking for a nice strong spark.
If you have spark, get a compression gauge and check your compression.
mxtech1 wrote:
Wrong. The best way to check for spark is to firmly hold the spark plug boot in your hand while kicking it. Your hand insulates the...
Wrong. The best way to check for spark is to firmly hold the spark plug boot in your hand while kicking it. Your hand insulates the plug and keeps it from jumping to anything metal.

The faster/harder you kick the better.
colintrax wrote:
Wtf are you talking about? There's no spark if the plug isn't grounded. That's why you touch the ground strap to the cylinder head (ground)
Try it and you'll see.....you don't have a heart condition do ya??
40Plus_922mx
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40Plus_922mx 12/11/2015 3:21pm
12/11/2015 3:21pm Edited Date/Time 12/11/2015 3:24pm
1). Flip the bike upside down.

2). Yank the plug and carefully crank the engine over with the kickstarter paying attention to the amount of water that comes out. -Re-assemble with new plug.

3). Drain the tank completely and flush it out with fresh gas then refill (with gas).

4). Clean the air filter and make sure it is bone dry of any water (but properly lubed).

Start it. If it runs then change the rest of the fluids. Trans, Coolant etc. Then a few days later change it all again.

If it does not start test the plug for spark by yanking it but leaving it attached to the plug wire. Carefully kick it over and look for spark. If it does not spark you have an electrical or ignition issue.

The possibility exists that it sucked water and could have bent something in the engine. But usually the pressure from the water plugs the exhaust killing an idling engine when submerged before it can suck it into the intake.

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