Topic: Hindle 4-2-1 Stainless exhaust - first impressions!

[markreimer]

Hey so have I! ......only I was 2 at that time.

[USMC5811]

Hey so have I! ......only I was 2 at that time.

I was well into my teens and listening to REAL punk
LOL


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[calj737]

So do you think that crusty part inside should be knocked down a bit..
 All the way may weaken it too much.

Not necessary at all.

I can see the benefit from a pure performance point of view, lessening restriction of exhaust flow, but I don't think I'd notice or appreciate such marginal gains enough to warrant potentially weakening the pipe. Correct me if I'm wrong but I can't image that would make much difference? If I wanted to go faster I don't think I'd grind the welds down...I'd do an 836 conversion 

There won't be any issues with performance. It's purely a quality control thing. And aesthetic.

[Lostboy Steve]

Ever see the guys racing lowered civics? The literally flatten the two lowest tubes from "asphalt grinding" until they have holes, then they replace them and start the process over again. How in the hell can you have consistent 1/4 times when your exhaust keeps changing? Dunno. Probably doesn't matter much. There's this video... on the other hand a small 4 probably takes notice of exhaust way more than a sbc.

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[754]

Here is what i keep thinking.. Most headers are far bigger than port exit..
 Now until the pipe gets smaller than that..is it really restrictive..?

It certainly did not slow his bike down..

[markreimer]

Here is what i keep thinking.. Most headers are far bigger than port exit..
 Now until the pipe gets smaller than that..is it really restrictive..?

It certainly did not slow his bike down..

Good question... I suppose if it's compatible size but not smooth (from welds) it could cause disturbance and restrict it slightly but I dunno if it'd be appreciable.

I also have an xr650l and one of the most common 'mods' I hear people do off the bat is to grind the welds down inside the header right at the exhaust port. People claim you can gain a HP from that but I dunno if anyone has proven that.


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[calj737]

The weld ripples on the interior won't hurt a thing from a performance perspective. There's insufficient exhaust gas flow and volume to be effected by the few, short humps.

The biggest reason to use a purge while welding stainless tubing (or titanium ((required)) is to insure that the weld stays against the tubing. Without the back purge, the oxygen present "sucks" the weld to the inside and "sugars". This can create porosity and small pinholes. Using the purge creates an oxygen-proof weld and eliminates any contaminants and prevents the weld from forcing its way inside and drooping.

Didn't mean to kick a hornet's nest by asking my original question 

[pipeguy]

gonna keep an eye on this one.

[markreimer]

Finally got around to installing this today.

I converted to 40mm studs. 45 would have made life easier though. Before I had the stock bolts and spigots.

Installation was a bit tricky as the bends in the system drew the whole exhaust up a bit and into the oil pan. It's currently touching the pan, which I'm concerned may lead to damage over time. I'm going to email ripple rock to see what they think. Everything else is bang on. With the whole system hooked up with the springs the muffler mount is exactly in line with the passenger peg bracket.

It's my fault, but I didn't realize this eliminated the ability to run passenger pegs. Oops. Good thing my wife got her own Sohc4 last year!

I have no experience with exhausts held by springs. Should they be 100% air tight?  When I fired it up I could see wisps of smoke coming out where the headers hook up. I used new copper exhaust gaskets so I don't think it's a gasket leak, but maybe where the headers slide onto the spigots? It looked to clear up after a few minutes I think. 








Here's where it hits the pan



Sorry no video. I have one but it was running rough. Realized #2 wasn't firing after seeing the other three headers start to turn bronze from the heat (normal for stainless). Turned out to be a wet plug. Fired right up nicely after and I forgot to shoot a video. It sounds fat and sporty, loud but not absurdly so. 


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[calj737]

Couple things for you to bear in mind:

Wipe the entire system down with Acetone before you run it much more. Any grease or oil left o the surface from handling and installation will turn a darker brown and not be easily removed.

You're 100% certain you got the old copper gaskets out of each cylinder? Sometimes, they're mashed in there pretty good and make fitment challenging the next go around.

To help alleviate the oil pan conflict, see if you can adjust the rear muffler hangar to be a bit longer. Doing so will pivot the pipes downward and away from the engine.


It certainly is a pretty looking system 

[markreimer]

100% sure! You can see in my first photo I have the original spigots with their corresponding gaskets under them. Unless there were two gaskets in there, I got em.

I emailed ripple rock to ask what kind of clearance to expect as their website photos show what looks to be nearly an inch of room. It might be my fault, but I doubt it really. I think the bends are just a hair tight.


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[markreimer]

Also great tip re acetone!


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[SOHC4 Cafe Racer Fan]

I have no contact on my 550.

[markreimer]

When did you buy your exhaust? I heard back from Ripple Rock, apparently the photos on their site are of an older design. The system has since been redesigned to allow for oil changes without removing the pipes, and also hugs the bike much tighter. They just installed the same one on a 750 in their shop, and I'm waiting to hear back if the collector piece touches their oil pan or if there is supposed to be 'daylight' between the exhaust and the bike.

As for the smoke around the spigots, I think that may have just been some oil and wd40 I used to help the pieces slide together burning off. The real test will come after I go for a ride. I should be able to tell if there are any leaks from the sound and backfiring during engine braking. That'll have to wait for spring though.

[markreimer]

A bit of searching the forum and I found photos of your Hindle 550 system. It's a totally different design, pretty cool looking. But The issue I have I don't think would be possible on yours since the two pairs of headers collect around the oil pan. Mine has a 'Y' piece directly under the pan, and has a slight upward angle, which is where my contact happens.

[calj737]

Post a picture of where your system attaches to the frame beyond the collector.

[bwaller]

I just wonder if the adaptors might be "adjusted" by slightly loosening the lower nuts and tightening the uppers. It would take so little to get clearance at the bottom.

[markreimer]

I just wonder if the adaptors might be "adjusted" by slightly loosening the lower nuts and tightening the uppers. It would take so little to get clearance at the bottom.

Hmm good idea. I'll give it a try! I've got a few sets of exhaust gaskets too so I could try tightening them after the exhaust is in place.

Ripple rock sent me photos of their 750 with the same system on it. Its sits very close to the oil pan but doesn't actually touch it, so it looks like mine has just been bent a touch more. It's designed to sit as close to the bike as possible, so I can see how if the first or second header bends were just a hair too much it would result in the horizontal section contacting the engine at some point. I don't think this is a major issue worth looking into an exchange, just trying to alleviate some stress in the system.


Here is the attachment for the muffler. It's the only attachment point other than the spigots.





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[Desert-SOHC]

I've worn plaid all my life and am no where close to a hipster...... ......more like biker-redneck!

[calj737]

If you temporarily remove the hangar bolt you pictured, can you push the muffler down and create enough space? You should only need to move that bolt hole lower by a 1/4". That should create an 1" of space underneath.

[Garage_guy_chris]

Here is a photo of the original system. I believe both versions are still available. Mine was a fairly early system hence the early design (no gap between 2 and 3).  Overall I have been very happy with the system Its holding up good and sounds fantastic, Only complaint is its going to be problematic to add an oil cooler adapter that i am needing for my big bore, but i happen to know Kemp has a cooler adapter in the works that will work with this early design.   

I also have this vid for a little idea on sound, this is a 16" long muffler

-=Video No longer Available=-

[markreimer]

Oh god that is a good looking bike drooooool


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[SOHC4 Cafe Racer Fan]

Pretty bike, Garage guy.

[Rocky2010]

Nice looking exhaust system also like it in stainless

[754]

If you temporarily remove the hangar bolt you pictured, can you push the muffler down and create enough space? You should only need to move that bolt hole lower by a 1/4". That should create an 1" of space underneath.

+1 on the above.. Unless the pipes press fit on the head , it should easily move at least 3/4 of an inch at that point.