Where to buy a check valve for breather line on 06 mastiff 117

[Jimhuck]

Hey guys , I’m new owner to a 06 mastiff with a 117 engine , I’m trying to find where to buy the inline check valve located between the rear jug and air cleaner back plate. I’m lovin the bike but not the oil misting out , I swear I saw one in my search to correct this but I can’t find it now, I would appreciate any help. Thanks Jim

 

[mleach72]

Hey guys , I’m new owner to a 06 mastiff with a 117 engine , I’m trying to find where to buy the inline check valve located between the rear jug and air cleaner back plate. I’m lovin the bike but not the oil misting out , I swear I saw one in my search to correct this but I can’t find it now, I would appreciate any help. Thanks Jim

You should be able to get one at just about any auto parts store. I believe the breather line is 3/8". If your valve is missing, that is creating a intake leak. The bike should run better when you replace it.

 

[TreeGuru]

S&S Part# 50-8122

 

[Jimhuck]

Thank you so much I found one at Dennis Kirk same part number too , can’t wait to put it on and run it

 

[mittens]

Pardon Our Interruption

 

[Jimhuck]

its still misting oil after I installed the new check valve, I installed it black side toward air cleaner and it should be sucking shut but it’s not, I beleave I have a vacuum leak somewhere and wonder if anyone could direct me further, I’m going to try spraying some starting fluid around intake manifold while it’s running, couldnt I plug the line so it’s not blowing out anymore,

 

[mleach72]

its still misting oil after I installed the new check valve, I installed it black side toward air cleaner and it should be sucking shut but it’s not, I beleave I have a vacuum leak somewhere and wonder if anyone could direct me further, I’m going to try spraying some starting fluid around intake manifold while it’s running, couldnt I plug the line so it’s not blowing out anymore,

Is the front breather line attached to the manifold?

 

[Jimhuck]

Yes it is,

 

[mleach72]

Yes it is,

Hmm, that is very strange. Pull the check valve out of the breather line and start the bike. If you put your finger over the breather line, you should feel a vacuum. If there is no vacuum, then something is screwed up. It made me wonder why the PO removed the valve in the first place. You can run both breather lines to the ground. Just remember to plug the hole in the ac and cap the vacuum port.

 

[Jimhuck]

there was a check valve in the line when I got it I replaced it thinking it was bad, I’ll See if there’s a vacuum when it’s running and post results , I really appreciate your help with this

 

[mleach72]

there was a check valve in the line when I got it I replaced it thinking it was bad, I’ll See if there’s a vacuum when it’s running and post results , I really appreciate your help with this

Also check the front breather line. Maybe it got clogged up somehow. Check the vacuum port on the manifold, the breather line, and the port on the head.

 

[TreeGuru]

Hey guys , I’m new owner to a 06 mastiff with a 117 engine , I’m trying to find where to buy the inline check valve located between the rear jug and air cleaner back plate. I’m lovin the bike but not the oil misting out , I swear I saw one in my search to correct this but I can’t find it now, I would appreciate any help. Thanks Jim

Jim reference your Blow By problem, Is it possible too much oil has been added to the crankcase on your last oil change. You have a drain plug on your oil tank and a drain plug on your crankcase. If you drain just your oil tank and add oil to factory specs without checking the dipstick your overfilled. If you are overfilled you can use a turkey baster to suck some out, clean breather housing and address bottom of air filter that is probably saturated with oil.
You will have a split in opinions about draining the crankcase because you don't want to strip the threads. It's better to use a product called Rogue Chopper Scavenger to remove the oil from the crankcase while you perform your oil change. That way you don't risk stripping the threads on crankcase.

 

[mittens]

Maybe I missed it but I only drain the Oil tank, and change the filter. I never drain the bottom of the case?

 

[HMAN]

Where exactly do you see the oil "misting"? May help narrow down the problem?

 

[Jimhuck]

Mleach 72 you were right I found the vacuum port on carb plugged , Now I’m gonna ride it and watch

 

[Jimhuck]

I’m back and still have oil misting on exhaust pipes right above oil pump, this is driving me nuts where this is coming from, I have no oil stains around head or base gaskets, the air cleaner is free from any oil that would saturate it, had a old Harley mechanic look and tell me to remove the line off backplate air cleaner and run it to the ground, anybody see any problem with this , i appreciate everyones input on this cause I’m going batshit crazy over this

 

[HMAN]

Id bet ya got a small rockerbox cover gasket leak. They leak when you moving but hard to see when its just sitting. After sitting there looking @ the bike, check the o rings on ur pushrod covers.

 

[Mickmorris]

I’m back and still have oil misting on exhaust pipes right above oil pump, this is driving me nuts where this is coming from, I have no oil stains around head or base gaskets, the air cleaner is free from any oil that would saturate it, had a old Harley mechanic look and tell me to remove the line off backplate air cleaner and run it to the ground, anybody see any problem with this , i appreciate everyones input on this cause I’m going batshit crazy over this

Post a picture of this so we can see what you see…I don’t think there would be a problem with running the breather line to ground.

 

[mleach72]

I’m back and still have oil misting on exhaust pipes right above oil pump, this is driving me nuts where this is coming from, I have no oil stains around head or base gaskets, the air cleaner is free from any oil that would saturate it, had a old Harley mechanic look and tell me to remove the line off backplate air cleaner and run it to the ground, anybody see any problem with this , i appreciate everyones input on this cause I’m going batshit crazy over this

You can run your breather line to the ground, but i have my doubts that that is where it is coming from. You would have noticeable oil in the air cleaner. If the breather system is working correctly, there should be very little, if any, oil coming out of the rear breather line. Check around the rocker boxes and lifter blocks. There has to be evidence of a leak somewhere.

 

[kickstart]

Jim reference your Blow By problem, Is it possible too much oil has been added to the crankcase on your last oil change. You have a drain plug on your oil tank and a drain plug on your crankcase. If you drain just your oil tank and add oil to factory specs without checking the dipstick your overfilled. If you are overfilled you can use a turkey baster to suck some out, clean breather housing and address bottom of air filter that is probably saturated with oil.
You will have a split in opinions about draining the crankcase because you don't want to strip the threads. It's better to use a product called Rogue Chopper Scavenger to remove the oil from the crankcase while you perform your oil change. That way you don't risk stripping the threads on crankcase.

I cannot understand the hesitation about removing the engine drain plug. You remove the drain plug from the oil tank why not the motor?
Anyone capable of changing oil should have no problem installing a drain plug correctly.