Randy Robinson
RR350
Has anyone used or have a Mac 2 into 1 exhaust system? I would like to have some feedback about this product. I’m building a cafe Bike and I’m looking for a exhaust
Thanks Randy
Thanks Randy
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Muffy
- Thread starter Randy Robinson
- Start date
Sunny1942
XS650 Member
Got one on my 79 , nicely made not too loud - but is louder than stock . I think most would like !
Yes they are harsh loud, I don't think they fit in on the old dears, the metal is very thin and rust "in the box" other than that I like em.
Hi Randy,
MAC's pipes have a rep for rusting real quick and I too prefer the balanced look of a pipe on each side.
Mind you, if I still lived in the UK the MAC 2 into 1 would sure free up the bike's left side to hang on a sidecar.
Randy Robinson
RR350
Thanks for your replies. Was there any better performance with the Mac 2 into 1 system?
Randy Robinson
RR350
What exhaust system would you recommend for a 1975 cafe?
Randy Robinson
RR350
I saw this on kijij I think it was very recent. Thanks for the info.
Lots of people suggest getting the bike running well with as many stock parts as you have before commencing major changes and then make upgrades one at a time so you know which one did not work.
As far a horsepower goes, if you are looking for strong highway performance, get a modern fuel injected bike and ride it daily. If you are looking for a classic bike that looks good, sounds good and usually gets you to the group ride and back, then you are on the right path.
Upload some pictures so we can focus our advice.
As far a horsepower goes, if you are looking for strong highway performance, get a modern fuel injected bike and ride it daily. If you are looking for a classic bike that looks good, sounds good and usually gets you to the group ride and back, then you are on the right path.
Upload some pictures so we can focus our advice.
Randy Robinson
RR350
I just picked up this bike last fall. It was a pretty good find but with any 42 year old there are issues. Bad compression, missing parts and aftermarket exhaust with holes which were repaired by brazing the holes and where the mufflers join the pipes brazed again. I have steering head bearings and new swing arm bushings. I’m striving for a nice unique looking reliable ride.
Attachments
That is a great looking bike as it sits. What year is on the ownership? Tins look like 75, but forks may be from a Special as the caliper is in the rear which means you have 35mm forks instead of the 34mm from 75. I am also guessing that the Special that donated the forks also donated the exhaust PO probably brazed the holes from the cross over pipe - all good. Compression may improve as it gets a few tanks of gas through it.
Let the group know what parts you need - many members have spares.
Let the group know what parts you need - many members have spares.
CoconutPete
1979 XS650 Special
My bike had a mystery 2-1 when I bought it. It looked a lot like the MAC ... could have been one.
It was loud, but not obnoxious loud, especially at idle.
The shorty reverse cone mufflers were louder. The 2-1 was in the middle and the full length reverse cones I have now are the quietest
It was loud, but not obnoxious loud, especially at idle.
The shorty reverse cone mufflers were louder. The 2-1 was in the middle and the full length reverse cones I have now are the quietest
Randy Robinson
RR350
Randy Robinson
RR350
The ownership says it is a 1975 and the forks measure 34mm.
I have cleaned up the valve seats,regrounded the valve and lapped them. Cylinders were honed with new rings installed. Swing arm bushings and shaft arrived today as well as steering head bearings and fork springs and seals. Looking forward to getting this on the road.
Contemplating what kind of exhaust to put on. I have a bit of time to ponder this. Too bad there is not a good swap meet happening soon and warm dry twisty roads
I have cleaned up the valve seats,regrounded the valve and lapped them. Cylinders were honed with new rings installed. Swing arm bushings and shaft arrived today as well as steering head bearings and fork springs and seals. Looking forward to getting this on the road.
Contemplating what kind of exhaust to put on. I have a bit of time to ponder this. Too bad there is not a good swap meet happening soon and warm dry twisty roads
Lou
XS650 Member
Hi Randy, I recently got a Delkevic 2-1 and so far so good. Appears to be of reasonably good quality, stainless steel. Not too loud for a 2-1 either. You can google em for different vendors, customer reviews, and here is one on Amazon: https://www.amazon.com/Exhaust-Race...qid=1519361318&sr=8-2&keywords=delkevic+xs650
There are also a couple YouTube videos of XS650 owners w Delkevic 2-1
That said, Id probably opt for a nice 2-2 if I could go back in time
and the Yo Mama pipes by Pandemonium look sweet too. Not sure about a Cafe application for em tho..
There are also a couple YouTube videos of XS650 owners w Delkevic 2-1
That said, Id probably opt for a nice 2-2 if I could go back in time
and the Yo Mama pipes by Pandemonium look sweet too. Not sure about a Cafe application for em tho..
Randy Robinson
RR350
I looked a little further into the forks and like I thought they are 34mm but what is strange is and you picked it out right away is the location of the caliper. Someone has switched forks for one side to the other and mounted the caliber on the backside and ran the steel brake line around the outside of the fork. Is there a good reason for mounting the caliber on the backside( possibly better handling or braking)? It looks better mounted in front and having the brake line protected behind the fork is the way to go.
I guess I'm old school too in that I think a cafe should have a 2-2 exhaust. The MikesXS Commando system is very nice. I have the Commando mufflers on MAC headpipes .....
The mufflers sound great and performance is better than stock. Another muffler I'd like to try someday are the actual Commando mufflers, peashooters I think they call them .....
https://www.ebay.com/itm/Norton-Com...e=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649
2-1's are known to be difficult to tune for. Most aren't designed with performance in mind, just to fit on the bike. Many scrape in corners as well. Honestly, a 2-2 system is a better choice. Twins perform best with them.
The mufflers sound great and performance is better than stock. Another muffler I'd like to try someday are the actual Commando mufflers, peashooters I think they call them .....
https://www.ebay.com/itm/Norton-Com...e=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649
2-1's are known to be difficult to tune for. Most aren't designed with performance in mind, just to fit on the bike. Many scrape in corners as well. Honestly, a 2-2 system is a better choice. Twins perform best with them.
I think a cafe should have tables outside with tablecloths, otherwise it's just another dive. Don't the 2 into 1's have a rep for holing pistons? I think I read that here somewhere back when we were young.
I did the same fork swap, side to side, and moved my caliper to right side/rear. My reason was to do away with the steel brake line and only use one brake hose. After these early disc brakes the calipers were mounted rearwards on newer bikes. I will drill away the flare fitting inside the caliper and cut a banjo bolt to fit the brake line to the caliper. Haven't measured for the banjo bolt length yet, maybe it doesn't need cut, either way, there's plenty of threads in the caliper for this to work.
Oh yeah, the axle is also reversed for this change.
Scott
EDIT, KEEP THIS IN MIND. There are no longer any dogs on the left side fork to place the speedometer drive in the right place, this must be done without the dogs whenever tightening the front axle from now on, no BFD.
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