Topic: 350F exhaust

[Dan50]

I bought this little 350F back in January but when I ride it for any distance it's making me deaf.  It currently has some rusted up MAC 4 into 2 side cuts with no baffling.  Seriously, I can put earplugs in and it's still extremely loud.  Unlike some others, I kinda like the looks of the slashcut exhausts and would not mind something new like these but I really need some baffles.

Has anybody put new exhausts on their 350 recently?  I don't see a whole lot out there on the market, just a lot of chrome MAC 4 into one megaphones.  I see Carpy makes a 4 into one but it looks like he sells them plain and you have to get them chromed if you want chrome, which I do.  Does anyone know what if any  other options may be?

[bender01]

I had those same pipes! I saw teens cringe from the sound! Your options are pretty limited. I took mac 4>1 and made a homemade baffle for it. But it rusted awful in only a year.

[bjbuchanan]

You could always replace the mufflers with another set of slashcuts, like denniskirk.com

I went on ebay and there was a ton of listings, with and without baffles. You could also add a baffler to any of the cheap ones, cycleshack baffle is like 20$

[Stev-o]

Or you could put on some good mufflers like the ones from Cone:

http://www.coneeng.com/pdf/motorcycle/MC%20finsihed%20Mufflers%20PDF.pdf

[Dan50]

Thanks so far for the replies, guys. 

bjbuchanan - Pretty much the only stuff I saw on ebay besides the $1100 reproduction jobs was the 4-1 Macs.  And on Dennis Kirk all I could find was the same 4-1 Macs for this bike.  Maybe I'm missing something?  Thanks

Stev-o  - It looks like Cone only carries the actual mufflers and you supply the pipes?  I actually need the whole shootin' match, pipes and mufflers.  thanks

bender01 - I am kinds worried about the quality on the Mac's.  I've heard others complain about rust on the welds, etc.  thanks

[jamesv220820]

Thanks so far for the replies, guys. 

bjbuchanan - Pretty much the only stuff I saw on ebay besides the $1100 reproduction jobs was the 4-1 Macs.  And on Dennis Kirk all I could find was the same 4-1 Macs for this bike.  Maybe I'm missing something?  Thanks

Stev-o  - It looks like Cone only carries the actual mufflers and you supply the pipes?  I actually need the whole shootin' match, pipes and mufflers.  thanks

bender01 - I am kinds worried about the quality on the Mac's.  I've heard others complain about rust on the welds, etc.  thanks

You are right the build quality of the Mac 4-1 isnt the greatest but it does do the job you just have to keep it clean and dry. The other options for exhaust made for the cb350f aren't in production anymore (jardine, marving, mivv, and another 4-4 system with a more cone type ending like the cb750).  You might be able to find some of the manufactures of those exhausts pop up on ebay from time to time but it is rare.

Too bad your 4-2 system is rusted out cause ya the cheapest solution if the headers were ok would be to toss new muffles on them.  So your options for new is either mac 4-1 or the very expensive reprodutions.

Trust me on these I think I might be the expert on exhausts for the cb350f cause I just got all OCD and started buying them up so I have my old original rusty 4-4, the mac 4-1 which is on the bike, and in storage my brand new marving 4-2 and MIVV 4-4 system.  Yes I have problems and I am greedy!

I will show you a big trick though it is how I found my original giulari seat is to check ebay germany (ebay.de).  CB350f parts over in germany still exist I don't know why that is if it is because there is a very little amount of them in germany causing there to have occasional parts that you can't find anywhere else or that there is so many cb350fs there that that is why there is so many parts.  I think it is because of the first one!

My feed actually blew up today for ebay germany!  You would diffently have to pay to play for these ones!!

http://www.ebay.de/itm/MARVING-4-2-Auspuff-exhaust-Honda-CB-350-Four-72-CB350F-NEW-/261397579281?pt=DE_Motorradteile&hash=item3cdc828611

http://www.ebay.de/itm/MIVV-Auspuff-Silencers-Honda-CB-350-Four-72-NEW-/380130378009?pt=DE_Motorradteile&hash=item5881894119

http://www.ebay.de/itm/MIVV-4-4-Auspuff-Exhaust-Honda-CB-350-Four-72-NEW-/380230827411?pt=DE_Motorradteile&hash=item588785fd93


Hope I could help

cheers

James

[Dan50]

James,

Haha good stuff.  Sounds like you may have the market cornered on these exhausts all by yourself!  I may hang around ebay a bit but will probably end up going with the Mac's.  That German stuff looks really nice but definitely is a bit pricey.  I would just hate to pay more for an exhaust system than I payed for the bike.  I'm too cheap.  Thanks for taking the time to write a nice post and to put up the links.

Dan

[flybox1]

+1 on the cone engineering slip ons.  They even have 2-1 collectors to make the fitting easier.

[calj737]

Whether your existing system or a new Mac, have them ceramic coated inside and out with the "silver". It's not chrome, but is awfully nice looking, nearly permanent, and aides in keeping the pipe cooler to the touch, and scavenging the exhaust gas.

[skidooextreme]

Mac 2 into 1 comes up every so often on eBay. That's what I bought this winter

[okie]

There is a set of MIVV mufflers on eBay right now.

[Dan50]

I ended up going with the Mac 4 into 1's.  Not totally happy, been going round and round with the seller and Mac because I was getting a nasty rattle/vibration out of the muffler/baffle.  They ended up sending me a new baffle but there is still a fairly loud buzz at about 4K and 7K.  Other than that, they look OK, but I still would have preferred the 4 into 2's.

[dbbrian350F]

i am wondering what people are doing with 4 into 4 pipes on these if they manage to find them.  I recall spending a lot of time patching the original rusting corroding pipes until they became garbage and I had to replace them.  Used to be you'd read about  due to the lack of heat from the little engine it couldn't dry out 4 separate pipes enough so they rusted.  Kind of a design flaw.  Maybe 4 into 1 is better suited, even though they don't look as good. 

So as much as I like the originals, I would want to know if there is a way to keep them from deteriorating so quickly before spending the hard earned ca$h.  Maybe the ceramic coating?

Brian   

[Stev-o]

I ended up going with the Mac 4 into 1's.  Not totally happy...

You were warned

[HondanutRider]

i am wondering what people are doing with 4 into 4 pipes on these if they manage to find them.
Brian

MIVV 4-into-4 - was able to nab one of the last new sets several years ago.  Paid more for them than the rest of the bike.  They are a lot heavier grade of steel than the originals.

[okie]

Actually, I believe they are Stainless Steel.  I have put the MIVV pipes on 3 bikes and never had any regrets about that decision.  I had a MAC 4 into 1 that I kept for about a week before I took it off and sold on eBay.  As I get older, I am learning that if I do it right the first time I just have to do it once.  If you scroll down on this link, you can see my '74 with a set of these pipes.

http://forums.sohc4.net/index.php?topic=36334.0

[HondanutRider]

Very nice Okie!  Looks just like mine only probably better.

There is some debate over the MIVV metallurgy.  While they are definitely chromed (and very good actually) I'm not certain that they are stainless.  They might be, but all the advertising and labeling I've seen list them as Chromed Steel.  I believe that is on the factory packing box that mine came in.  They also readily hold a magnet.

[calj737]

For exhausts, stainless has benefits and some inherent weaknesses. Stainless is more corrosion resistant than mild steel, but it is much more brittle and will crack or split sooner than mild steel due to repeated heat cycles.

Mild steel (most common material for exhausts) is more prone to corrosion (especially from inside) but tolerates the expansion and contraction of heat cycles far longer than stainless.

The best solution is ceramic coating inside and out for either, providing the best equalizer between the two materials.

[bender01]

"nasty rattle/vibration"
 At 4-5500rpm? Yeah that's why I made my own baffle! Took the mac baffle and cut off the front stuffed a sink strainer and dollar store s/s scrubbies in and screwed the back of the original baffle back on! It was a few tries with stuffing but eventually I got rid of that ripping sound!

[Vinhead1957]

Shouldn't mix stainless with mild steel either. Law of less noble metals. The stainless will cause the mild steel to corrode faster.

[dbbrian350F]

Its good to hear there is a solution with better than the originals.

Okie you bike looks very nice with the MIVV's, and you paint too.  What was your approach for paint?

[okie]

Harbor Freight sandblast cabinet, rattle can black, rattle can clear, cbdecals.  I did a lot of buffing out the paint with 3M Marine Restorer and Wax(from WalMart sporting goods area).  The decals were the real lifesaver for me. 

http://www.cbdecals.afegraphics.com/index.php?adminshopping=&cat_id=90&catname=%271974%20cb350f1%20Black%27

[dbbrian350F]

Tnks Okie gonna save this info

Realizing I am going to need those decals too.