Honda CL style exhaust for nighthawk 250
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Thread: Honda CL style exhaust for nighthawk 250

  1. #1
    Senior Member fuego's Avatar
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    Question Honda CL style exhaust for nighthawk 250

    I'm sure this has been asked before. Contemplating how I can achieve the CL style pipes on my nighthawk 250. I've found CL360 exhausts on craigs but before I decided to buy I need some advice. I'm guessing that it wont be a bolt on mod.

    Anyone else try this?
    1978 CB125s
    2000 Nighthawk 250

  2. #2
    Senior Member Alan F.'s Avatar
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    I have not tried this.

    But I have 250 Nighthawks and wonder what I'll do when all the used stock exhausts are gone.

    Designing an exhaust system that leaves you with a rideable/reliable/fun bike takes lots of calculation.
    There is much more to it than cut/weld/grind, repeat. And the odds of finding a complete system from a scrambler that'll bolt up are slim to none.
    It'd be cheaper to start from scratch with a good design than to hack up good vintage parts from a bike with a faithful following.
    HamHock likes this.
    CB250 Nighthawk projects 92,93,92.
    81 CM400C Sold
    93 CB750 Nighthawk Sold
    73 CB750K3 Long term project stuck in the 'parts collecting stage.'
    Fork Swap info: http://sites.google.com/site/alansdocuments/

  3. #3
    Super Moderator longdistancerider's Avatar
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    The question has been asked multiple times but to date no one has stepped up to actually try.
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 nuts and bolts restore in progress


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  5. #4
    Senior Member Alan F.'s Avatar
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    I'm gonna say based solely on exhaust gasket dimensions that its a no go.

    The 250 NH: Honda Exhaust Pipe Gasket Seal 31.50 x 39.80 x 4.0 18291-216-000/MN5-650 https://m.ebay.com/itm/Honda-Exhaust...IAAOSw-W5UsCVP

    And the cl350/360: Honda Exhaust Pipe Gasket Seal 37.2 x 46.2 x 4.7 18291-286-000/306

    https://m.ebay.com/itm/Honda-Exhaust...UAAOSw8d9UsCVe

    Perhaps from a smaller bore bike?
    CB250 Nighthawk projects 92,93,92.
    81 CM400C Sold
    93 CB750 Nighthawk Sold
    73 CB750K3 Long term project stuck in the 'parts collecting stage.'
    Fork Swap info: http://sites.google.com/site/alansdocuments/

  6. #5
    Senior Member Alan F.'s Avatar
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    It would appear that CL175 used the same gasket as the 250NH: Honda Exhaust Pipe Gasket CL CB SL 100 175 ++++ Qty.1 # 18291-306-000
    https://m.ebay.com/itm/NEW-Honda-Exh...AAAOSwG-1ZyVRJ

    In the item description it calls out 91 cb250 but no dimensions are given and I couldn't reference them anywhere.
    CB250 Nighthawk projects 92,93,92.
    81 CM400C Sold
    93 CB750 Nighthawk Sold
    73 CB750K3 Long term project stuck in the 'parts collecting stage.'
    Fork Swap info: http://sites.google.com/site/alansdocuments/

  7. #6
    Senior Member fuego's Avatar
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    It will probably be safe to keep it stock.

    This sparked the idea: Honda CB250 Nighthawk Scrambler ? BikeBound In this case it is complete custom made.

    Appreciate the replies. check out that link.
    1978 CB125s
    2000 Nighthawk 250

  8. #7
    Senior Member Alan F.'s Avatar
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    I've seen photos of that one before, there are a few others out there too but all one-off builds.
    It seems to be an opportunity to design and produce a couple of good systems that would sell if pricing was good.
    CB250 Nighthawk projects 92,93,92.
    81 CM400C Sold
    93 CB750 Nighthawk Sold
    73 CB750K3 Long term project stuck in the 'parts collecting stage.'
    Fork Swap info: http://sites.google.com/site/alansdocuments/

  9. #8
    Senior Member fuego's Avatar
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    have you guys seen any 2 into 1 options? Feel like the bikes after market parts are very limited. I've sen some for CB350/360 on Dennis Kirk but I don't think those will work on this bike.
    1978 CB125s
    2000 Nighthawk 250

  10. #9
    Senior Member Alan F.'s Avatar
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    Pipes from 350s and 360s won't fit and are too large inside diameter to modify, forget those.

    There are a few 2into1 pipes on ebay, my favorite is this one: https://m.ebay.com/itm/MADMAX-Short-...oAAOSwOyZZcnGG

    Sorry that's for the wrong cb250.

    I can't find the one I meant, its bookmarked on a different computer. I'll update when I can.
    Last edited by Alan F.; 04-11-2018 at 12:29 PM.
    CB250 Nighthawk projects 92,93,92.
    81 CM400C Sold
    93 CB750 Nighthawk Sold
    73 CB750K3 Long term project stuck in the 'parts collecting stage.'
    Fork Swap info: http://sites.google.com/site/alansdocuments/

  11. #10
    Senior Member Alan F.'s Avatar
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    Here are the two I was thinking of, pricing is average but shipping from JAPAN is high.

    https://japan.webike.net/products/21423709.html

    https://japan.webike.net/products/21423791.html
    CB250 Nighthawk projects 92,93,92.
    81 CM400C Sold
    93 CB750 Nighthawk Sold
    73 CB750K3 Long term project stuck in the 'parts collecting stage.'
    Fork Swap info: http://sites.google.com/site/alansdocuments/

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