[ShakyJ]

I have a 2018 Honda Foreman 500 has right at 100 hours and roughly 500 miles on it. I was riding at Busco Beach and somehow my rubber hose crankcase breather tube that goes to airbox came off somehow. It got water in the bottom end and I didn't know it until I rode around for about an hour and noticed a change in engine noise over time. I checked the oil and thats when I noticed the water in bottom end. I changed Oil about 10times just to insure I got all water and whatever else out. It runs and cranks perfectly fine like it always has although it idles perfect when you start riding it has a very slight faint rod knock.
I CANT FIND A CRANKSHAFT/REBUILD KIT ANYWHERE FOR THIS NEW MODEL
What other models will work so I can order a crankshaft and rod kit to make this rebuild easy without having to rebuild my crankshaft.

 

[fishfiles]

Contact Mr Crankshaft , you send him your crank and he rebuilds it with a new rod and sends it back , ask if a Versha rod is available for your model , they are suppose to be better than stock , stock might not even be available for your model

 

[shadetree]

2018 trx500 what ???????????????????.. you have any idea how many trx500 models are on the market ?????. partzilla list many !. if they show them on their list, then chances are, they sell your crank. new atv, and you think its a boat ?, sigh...when are folks ever going to learn...THEY ARE NOT WATER PROOF !!. oh..and I bet you a dollar to a dime, if you do not split that motor, and clean it out RIGHT ?!, your motor will not last !.

 

[ShakyJ]

I plan on splitting the case anyways to clean it out good and replace everything while im in there and actually if done right like every HONDA I've ever owned they are waterproof!! They always last and always last a lifetime I just had a stick jump off the ground and jerk my rubber hose off the airbox that goes to crankcase. Thats the only reason water got inside otherwise it does perfect and airbox is always 100% dry after every ride.

 

[ShakyJ]

Where do I find contact information for Mr. Crankshaft?

 

[KoolBreeze]

Where do I find contact information for Mr. Crankshaft?

http://www.mrcrankshaft.com/

 

[shadetree]

I plan on splitting the case anyways to clean it out good and replace everything while im in there and actually if done right like every HONDA I've ever owned they are waterproof!! They always last and always last a lifetime I just had a stick jump off the ground and jerk my rubber hose off the airbox that goes to crankcase. Thats the only reason water got inside otherwise it does perfect and airbox is always 100% dry after every ride.

I hate to burst your bubble ?..BUT NO ATV MOTOR IS WATER PROOF ...EVER !!!. just because you dont see water in the air box ?, DOES NOT MEAN WATER IS NOT GETTING INTO THE ENGINE FROM OTHER PLACES ?, like oil seals ???. whatever you want to believe ...go for it !, but I know what I am talking about .

 

[ShadePalm]

So then the engine has bad oil seals. Working at a licensed repair shop for 5 years, I saw lots of ATVs here in FL come through daily with all kinds of problems as well as oil changes. Being a sandy flat terrain, ATV life gets boring fast down here, so they always snorkel their ATVs and make submarines out of them. Newer engines have newer seals, and the oil wasn't contaminated from their abusive use. But tired ATVs, you'd see some seepage.

Outboard engines have a lower unit that sits in water routinely, because that's where the prop is located. The low end unit has gears below the water level that depend on seals and gaskets to keep water out, until they fail. Good oil seals, seal. If the engine wasn't waterproof, it wouldn't be oil proof either, and oil would leak out on your garage floor, like a Harley Davidson...

So eventually, seals harden and leak. But a fresh engine with good seals, shouldn't be cause for concern. After a ride, don't you check the oil for contamination? After boating, I check the low end unit periodically for water in the gear oil, and replace the seal when I see that Wendy's Frosty mixture in there. Gear oil / gears are a lot more forgiving than the high rpm of a combustion engine though. LOL

P.S.
You still park and look at those motorcycles, or ride them?

 

[shadetree]

So then the engine has bad oil seals. Working at a licensed repair shop for 5 years, I saw lots of ATVs here in FL come through daily with all kinds of problems as well as oil changes. Being a sandy flat terrain, ATV life gets boring fast down here, so they always snorkel their ATVs and make submarines out of them. Newer engines have newer seals, and the oil wasn't contaminated from their abusive use. But tired ATVs, you'd see some seepage.

Outboard engines have a lower unit that sits in water routinely, because that's where the prop is located. The low end unit has gears below the water level that depend on seals and gaskets to keep water out, until they fail. Good oil seals, seal. If the engine wasn't waterproof, it wouldn't be oil proof either, and oil would leak out on your garage floor, like a Harley Davidson...

So eventually, seals harden and leak. But a fresh engine with good seals, shouldn't be cause for concern. After a ride, don't you check the oil for contamination? After boating, I check the low end unit periodically for water in the gear oil, and replace the seal when I see that Wendy's Frosty mixture in there. Gear oil / gears are a lot more forgiving than the high rpm of a combustion engine though. LOL

P.S.
You still park and look at those motorcycles, or ride them?

when I am not busy ?..( which right now..i am swamped ! ) yes..i ride them, both of them !...lol.