02-21-2017, 06:55 PM | #1 |
Join Date: May 2016
Location: Central New York
Posts: 32
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Hawk Exhaust Replacement
Work has kept be busy most of the winter, but have been saving up money to add some improvements to the Hawk. I purchased this exhaust system from ebay. If i have read right, the holes for the header need to be milled out to 1/2 inch? I want to do this right the first time. Any advise is appreciated
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02-21-2017, 07:04 PM | #2 |
Join Date: Nov 2016
Location: robertsdale alabama usa
Posts: 1,007
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i would fit it first to make sure they look big enough to me.
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1991 harley heritage softail classic 2016 hawk kaw h1 400 tripple 13' long chopper in progress 2009 johnny pag bar hog 2004 hd electra glide ultra classic shriner edition 1997 harley davidson 1200 sportster 1972 harley davidson amf sx250 |
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02-21-2017, 07:06 PM | #3 |
Join Date: Nov 2016
Location: robertsdale alabama usa
Posts: 1,007
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there is also a copper gasket that you want to get. someoen will chime in with a link. about $3.00
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1991 harley heritage softail classic 2016 hawk kaw h1 400 tripple 13' long chopper in progress 2009 johnny pag bar hog 2004 hd electra glide ultra classic shriner edition 1997 harley davidson 1200 sportster 1972 harley davidson amf sx250 |
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02-21-2017, 07:29 PM | #4 |
Join Date: Oct 2013
Location: Leesville SC
Posts: 835
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My Stable- 2022 Lifan KPX250 , 2023 Royal Enfield Himalayan, 1992 Honda GL1500 Goldwing, SSR 70 Auto, Kymco Mongoose 90, Honda Four Trax 300 |
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02-21-2017, 07:50 PM | #5 |
Join Date: Dec 2016
Location: Western PA
Posts: 363
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You might need to get a little bracket extender for the muffler, but some people have got away with bending the pipe for it to fit. Be aware that if you do bend it, it can be in contact with the airbox.
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02-21-2017, 08:41 PM | #6 |
Join Date: May 2016
Location: Bismarck, ND
Posts: 868
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The holes do need to be drilled out to 1/2". I would take the pipe in and have done. I did it myself and It was a pain.
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2015 and 3/4 RPS Hawk 250. Most people would call it a 2016 but the MCO didn't. |
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02-21-2017, 09:36 PM | #7 |
Join Date: Jan 2017
Posts: 13
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yes the holes do need to be expanded out a bit, how much? well, thats going to depend on the sweat-shop that put the thing together. i would say between 1/4 to 1/2 a inch is about right.
one thing no one on here (that i've seen) will tell you is that these china "exhausts" are NOT a direct bolt on. mine required a LOT of tweaking to get it so it wasnt rubbing on the engine casing and the back support by the rear brake reservoir. oh and the air box. and believe me, stainless steel does not want to bend at all. and lastly, if its touching the air box it well melt it (ask me how i know!) my solution was to cut off about 1 inch of the air box, fashion a piece of plastic to fill the gap and used JB Weld Plastic Epoxy to get it all back into shape (dont forget the can of flat black.) unfortunately i couldn't prevent the back piece from rubbing in the back, so to minimize the contact i put a U shape bracket in there so it has less surface to transfer heat and its been ok since then. oh and, heat wrap does NOTHING to prevent direct contact heat transfer other then slow it down a bit. pictures attached. enjoy. (and the melted look is just my shoddy application of the epoxy, it hasn't melted at all) |
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02-21-2017, 10:22 PM | #8 |
Join Date: Oct 2015
Location: connecticut
Posts: 980
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Its a china bike nothing is a direct bolt on.
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02-21-2017, 11:54 PM | #9 |
Join Date: May 2016
Location: Bismarck, ND
Posts: 868
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The studs on the engine are about 7mm and the holes in the flange need to be 1/2" for it to fit without cutting off the ends of the flange.
You can call me crazy but I was the first one to buy the RCH exhaust here. It was made for the Honda CRF150F and CRF230F. I took notes from the guys that were buying the stainless steel full exhaust and it led me to ebay to find something that was cheaper and cut weight. It does require mods to make it fit. What makes this website great is people post what they have done and give other people ideas.
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2015 and 3/4 RPS Hawk 250. Most people would call it a 2016 but the MCO didn't. |
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02-22-2017, 06:02 AM | #10 | |
Join Date: Sep 2015
Posts: 436
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Quote:
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02-22-2017, 08:16 AM | #11 | |
Join Date: Jun 2016
Location: akwesasne, NY-13655
Posts: 2,220
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Quote:
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02-22-2017, 10:51 AM | #12 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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Dremel
Here's how I did the exhaust bracket mod on our CG motor.
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"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 Last edited by 2LZ; 05-26-2020 at 12:24 PM. |
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02-22-2017, 02:53 PM | #13 | |
Join Date: Oct 2015
Location: connecticut
Posts: 980
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Quote:
So what makes milk better than oil? I'm afraid to ask what you put in your coffee..... |
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02-22-2017, 03:57 PM | #14 |
Join Date: Jun 2016
Location: akwesasne, NY-13655
Posts: 2,220
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The cassien in condensed milk with stands the heat of drilling better than dino oil. I'm sure by now they have much better hi temp oils than they had in the 1980's. I put half and half in my coffee. I never liked "canned cow" in my coffee....ARH
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02-22-2017, 04:22 PM | #15 |
Join Date: Nov 2016
Location: robertsdale alabama usa
Posts: 1,007
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i was juggling whether to get new exhaust or de-cat the oem! tihs has made up my mind im going to de-cat the oem. im cheap like jerryhawk!
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1991 harley heritage softail classic 2016 hawk kaw h1 400 tripple 13' long chopper in progress 2009 johnny pag bar hog 2004 hd electra glide ultra classic shriner edition 1997 harley davidson 1200 sportster 1972 harley davidson amf sx250 |
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