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Discussion AHL

Discussion in 'Kawasaki 250cc In-line 4's' started by Unkepttoenails, Mar 30, 2019.

  1. Unkepttoenails

    Unkepttoenails Demented

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    I am curious to see peoples opinions on AHL as i need standard bore rings for my A model but cannot find oem rings and the only other option i can find are these . does anyone have any experience with them?
     
  2. Murdo

    Murdo The Good Doctor Staff Member Premium Member Ride and Events Crew Contributing Member

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    Have used them in Four CBR engines now with no problems. The rings bedded in quickly and all three engines are still running strong. The pistons have the same markings as the original Honda pistons so I guess they are using the old tooling to make them. One set arrived with a broken top ring, I emailed them and they sent another set express post to replace. Good service.
     
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  3. Unkepttoenails

    Unkepttoenails Demented

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    Thanks murdo so you recommend them thank you very much , about what mileage have you put on and what break in procedure did you follow ?

    Sent from my Redmi 5 Plus using Tapatalk
     
  4. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    My two cents. Warm the engine, not at idle, then take it for a short ride and flog it. Redline in a few lower gears. Go home and let it cool down. Repeat. Done.
    https://www.enginebuildermag.com/2018/05/how-to-break-in-your-piston-rings-the-right-way/
    We have a thread here in the Tech Tips section https://2fiftycc.com/index.php?threads/hone-fit-new-rings.2939/

    If you put an @ in front of the person's username then they will get a notification that there has been a response to them. Like this @Unkepttoenails
    Cheers
    Blair
     
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  5. Murdo

    Murdo The Good Doctor Staff Member Premium Member Ride and Events Crew Contributing Member

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    The first set went into my road CBR and have done about 4,000km so far. Second set into the engine I use in my drag bike, has done two years of abuse and still going strong. Third set in another roadie, done about 2,000Km. Fourth set in my MC-14 which has only gone to top of hill and back. Run in involves warming engine for a few minutes and in third gear from 4,000rpm up slight gradient giving full throttle (ie full load) until about 10 to 12,000rpm and snap throttle closed until back to 4,000rpm and repeat twice more going to around 15,000 rpm the third time. Let engine cool down then ride normally without overloading (or 'lugging') the engine for about the next 100Km. That is what I do and works for me.
     
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    Last edited: Mar 30, 2019
  6. Cbuzz

    Cbuzz Well-Known Member Dirty Wheel Club

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    AHL = Ali express ?
     
  7. Murdo

    Murdo The Good Doctor Staff Member Premium Member Ride and Events Crew Contributing Member

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  8. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    @Linkin and @Joker have also used the AHL piston's, ring's and valve stem seal's without problem's too
     
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  9. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    I used a set of AHL pistons and rings in a 3LN... as per Murdo's post, the pistons were indistinguishable from the OEM part, the same casting marks all around. I concur that they must have acquired the old tooling.
     
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  10. Unkepttoenails

    Unkepttoenails Demented

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    @Murdo @maelstrom thanks for he advice on the break in procedure and the opinion on ahl , it would be really great if they did get the old Kawasaki tooling . I'll get a set of them in the coming weeks and post back the results when I'm off school
     
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