Swapping a Huangsheng for a Honda is it easy?

Discussion in '4-Stroke Engines' started by Irish John, Jun 7, 2008.

  1. Irish John

    Irish John Guest

    I have a Grubee gearbox with Huangsheng and it's not quite powerful enough to pull up hills without dropping to 25km\hr which is not good for the motor. Can I replace it with a Honda GXH 50 QHA - (the model with the right shaft is I think the QHA) Is it a just a simple job of unscrewing the old Grubee gearbox and centrifugal clutch and attaching the Honda motor & its shaft straight on?
     

  2. ocscully

    ocscully Member

    Yes

    ocscully
     
  3. fetor56

    fetor56 Guest

    You can put either Honda engines(QXA/QHA) into the Grubee & i'm sure with a better exhaust it'll perform even better.A friend is experimenting with exhausts now so it should be interesting.....if he's noticably successful i'll be following.
     
  4. Irish John

    Irish John Guest

    I wonder if my full length motor bike type exhaust might be sapping power on hills. I have a normal poo poo type that came with the kit but as I only have one gasket I'm afraid to wreck it by changing the exhausts to experiment. I think the Honda owners seem to get a bit more oomph from their motors. On my 750 Suzuki 4-stroke I replaced the exhaust system with a special British one specially made for the Suzuki and although it sounded absolutely fantastic the performance was only a tiny bit better.
     
  5. MasterLink

    MasterLink Member

    i put my stock muffler box that came with my honda its seems to run cooler ..but when i put the short poo poo pipe on and took the cap off sounds really cool

    john when its windy out here about 20 mph winds... it slows me way down iam on a 48 tooth
     
  6. Irish John

    Irish John Guest

    It looses power when you take the end off. Also sounds a bit like a tractor. I've never heard the short poo poo pipe on cos I use the long mototbike one which sounds nice. Do your tappets rattle? Mine rattle when they are set right but if I stop them rattling the engine has no compression so I guess they are supposed to rattle. The 48T is affected by slope more than wind I find cos when I hit 64km\hr with the 44T it was into a headwind on the flat.
    I might try the 56T again just to convince myself it is absolutely no good on the flat. The 48T only does 48km\hr which is 30mph in your language and that is flat out. Those 4 sprokets from 44 to 48 make a difference so an extra 2 to make it a 50T would probably be good but I can't get hold of a 50T sprocket.
     
  7. MasterLink

    MasterLink Member

    i think mine makes some noise i adj. them also the cover hide most of the sound ..seems some days my bike runs great then others its **** with the chug chug at the starts i put a new cab on and it was great for about 1 tank now it back to the chug chug iam goin to check for leaks with some cab cleaner if you spray it by the the carb and the motor revs up means its leaking ,, hey u can call king sales on the left he can get u any size sprocket u need he says ...but he never called me back so i lost hope in him u can try see if he talks to you
     
  8. bushido

    bushido Member

    do you guys know anyone that offers a kit without the hua sheng motor? i want the mounting kit separate from the engine.
     
  9. ocscully

    ocscully Member

    http://bicycle-engines.com is the GRUBEE Importer/Rep. but I believe they are out of stock until later this summer. You might contact them to get an update as to when they expect to get them. I would call them rather than use e-mail, they aren't very good about responding to e-mail in a timely manner.

    ocscully
     
  10. Irish John

    Irish John Guest

    Try this URL they sell parts for the Hoot kit but bear in mind only the special Huangsheng motor with special shaft will fit the Hoot.
    http://search.ebay.co.uk/_W0QQsassZdaoji888
     
  11. Irish John

    Irish John Guest

    Thanks Masterlink for all that exhaust stuff - interesting. Fetor56 is experimenting too he says and no doubt we'll find out soon how to get some extra oomph.
    I wrote to Kings sprockets and got a short "sorry we don't have a 52 tooth" also wrote to Andyinchville and haven't heard back.
    Spookytooth have a 50T but not 52T. The 50T is chrome steel and costs $12 which is cheap alright. I'm suspicious of cheap though.
     
  12. MasterLink

    MasterLink Member

    i have the chrome 48 tooth and the non chrome 44 tooth here and the chrome 44 tooth as well the chrome ones look better to me but then again iam sure thats just because its chrome when iam running around town i like to put the chrome muffler on but for going to work i just keep the muffler box on ..its nice cas its not loud and i have long ride to work ,,,but it sounds like a little harley and the front wheel even shakes with the straight pipe on i just took that screw out and took the end off i sure dont understand that andy guy ( kings ) says all over he can make any kinda you need now he cant i haven't heard anything bad about spooky will you let me know how it works out john
     
  13. Irish John

    Irish John Guest

    I'm drawing up a sprocket for Andy to make me. I'll need 2 sprockets either 50T or 52T to fit over the Shimano Nexus 7 spd hubs that come with the Schwinn deluxe 7 cruiser. Apart from the hub this bike is perfect for motorising cos it has springer forks with front V-brakes and a rear coaster brake. It costs a lot of money in Australia though at $820.00 incl. freight.
    I've found that the new sprockets will have to have a 64mm diameter centre hole to fit over the hub and go flush against the flange and the bolt holes will have to be 48mm out from the centre of the hole in order to clear the flange which takes them pretty far out compared to the standard kit sprockets.
    I'll have to draw it all up in CAD and issue a drawing to get it made right. Andy tells me he can make me any sprocket size but I got an email before that from someone at Kings saying just "Sorry no 52T sprockets". Didn't even answer my main question. Not very good service I reckon.
     
  14. ocscully

    ocscully Member

    Have you actually measured a Nexus-7 that has a Flange OD of less than 100mm, or are you planning to actually drill holes in the hub flange for the mounting bolts?

    ocscully
     
  15. Irish John

    Irish John Guest

    Yeah Oscully, I had it measured today down a phone line with a vernier scale today by someone at a bike shop and the hub dia. varies from 52 - 62mm and the flange dia. is 94mm but before I send off the drawing to Andyinchville I am meeting the Shimano rep so I can eyeball it myself. There's a lot of money at stake here (about $2000) and the architect in me makes me eyeball everything so I don't stuff up. These Shwinn D7s are perfect cos they have front brakes on a springer and only the Australian version has that. I've been looking for years for one of these without any joy but I need the coaster brake which comes with the N7 hub so I want to design my way around it and kill two birds with one stone. Bird one is finding a perfect bike and bird two is finding the perfect size sprocket for a 4-stroke.
    Pity that the D7 cruiser colour in Oz is Black & white but that saves me painting the fuel tanks to match. I'll build quite a few of these cos plenty of people will want them (and only a few will get one!)
     
  16. MasterLink

    MasterLink Member

    a work of art. in the making
     
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