As you all know ive been choochin' away at getting this machine running perfect, and you all helped me do that! But me being a perfectionist, I STILL felt it was running a bit off even after all the trail and error with syncing, carb cleaning yada yada YADA. Anybody else it would have probably been good enough... but not me.
https://youtube.com/shorts/97p0eOF04PY?feature=share
Anyways
So after a ride I figured I'll spray the damn intake boots with carb cleaner thinking... I DOUBT THIS WILL DO ANYTHING. Because I sprayed both boots before with no result. So why would this even do anything now? Well I decided to spray ALOT more carb cleaner instead of just a teeny tiny bit. And this is what I got (check out the video)
So this Rpm drop is obviously an induction of a vacuum leak right? I'm not crazy right? This damn boot is leaking...
Clamp is tight just incase anybody was wondering
Vacuum Leak (video)
- Pio412
- Practicing Bicycling
- Posts: 48
- Joined: Sun Dec 11, 2022 8:13 am
- My Bike: 2000 Suzuki Intruder VS800GL
Vacuum Leak (video)
Designer/Engineer
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- Joined a 1100cc Club
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Re: Vacuum Leak (video)
The intake manifolds can become brittle and can crack over time.
Inspect them. Replace if necessary or smear a coating of RTV on them.
Inspect them. Replace if necessary or smear a coating of RTV on them.
- Designer
- Joined a 1200cc Club
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- My Bike: Two 1400 Custom Made Choppers
Re: Vacuum Leak (video)
I'd start with what Mighty Navigator said.
Small lineal Cracks that are virtually unseeable can be the source of your anguish
Small lineal Cracks that are virtually unseeable can be the source of your anguish
- Herb
- Joined a 1200cc Club
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- My Bike: 1999 1400 intruder
Re: Vacuum Leak (video)
If the boots had ever been off of the cylinders the seal between the boots and the cylinder might be bad or a small crack right at after the carb clamp, that is a pretty comoon place for those cracks.
It is hard to say what the issue is until you pull the boot and check it out.
It is hard to say what the issue is until you pull the boot and check it out.
I can't seem to win the lottery. I think I have used up all of my good luck riding motorcycles.
- Pio412
- Practicing Bicycling
- Posts: 48
- Joined: Sun Dec 11, 2022 8:13 am
- My Bike: 2000 Suzuki Intruder VS800GL
Re: Vacuum Leak (video)
Okay so I removed the manifold, checked for cracks, they look great! checked the seal, looks good added some grease for a better seal and installed them. still running the same.....
hmmmmmm
hmmmmmm
Designer/Engineer
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- My Bike: VS800 Honda Phantom 200
Re: Vacuum Leak (video)
2 things further to check.
1. The small manifold from carb to head has an o-ring on the head side, check its condition.
2. Check the vacuum port screw has a copper or fiber sealing washer.
1. The small manifold from carb to head has an o-ring on the head side, check its condition.
2. Check the vacuum port screw has a copper or fiber sealing washer.
Grow old disgracefully young man.