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Thread: [AM6] Engine knocking? Balance shaft?

  1. #16
    apriliaforum expert ToraTora's Avatar
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    If you have a main bearing, or a large end bearing going the engine could grenade at any point. That he rode it around like that for any amount of time is crazy. But if you don't have the resources you don't have the resources. You could try to find another used engine, or another bike, and ride than until you can properly deal with the issue. With bikes like these it's going to have more than one laying around.

    It is probably much easier to get parts for these bikes where you are than here in the States. :P We have to get nearly everything from Europe. The last time there was a Derbi dealer in the States was back in 2005, and even then they didn't provide decent service. AF-1 made it nice for the RS50s, but their parts stores have dwindled, and they are now getting stuff from Europe too. How is shipping from the Netherlands to Lithuania? Seems like you could even drive over there for parts.

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  2. #17
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    Check sites from Poland...They are few levels higher for Auto/Moto sport than anyone in the world.

    Motor x-pl for example is a nice store.

  3. #18
    apriliaforum expert ToraTora's Avatar
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    Quote Originally Posted by loveJDM View Post
    Check sites from Poland...They are few levels higher for Auto/Moto sport than anyone in the world.

    Motor x-pl for example is a nice store.
    Post links!

  4. #19
    apriliaforum newb Zastava's Avatar
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    Finding parts is a no biggie for me, since we have a number of dedicated scooter part shops, my friend has contacts to abroad dealers and can get stuff for a bit cheaper. Driving to other places for parts isn't worth it, since I am 16 and my bike is a low-key commuter, not a grown mans toy.

    The thing is that I've already spent alot of money on it and it is still sitting in the garage for almost 6 months now, yet the school is coming too. This is the second time with bad luck in buying a stroker.

    I hope that it holds up this season and then I could replace the crank and bearings in winter, or drive it to a place to get fixed, because I do not have a nice garage nor all the tools required.

  5. #20
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    Quote Originally Posted by ToraTora View Post
    Post links!
    https://motor-x.pl

  6. #21
    apriliaforum newb Zastava's Avatar
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    Quote Originally Posted by loveJDM View Post

    https://allegro.pl/

    Basically like polish ebay, but has alot of listings for scooter parts.

  7. #22
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    to dismantle an engine I would say the only tool you have to buy is the flywheel removing tool these are cheap. 15euro
    other specialist tools make life easier but you can do without
    Regarding cost you can buy cranks from 50euro but I understand it's still 50euro
    you would also need gaskets set oil seal set and consider bearings in truth budget 120Euro.

    If its run for 2 years hmm … I would say it all down to risk, as serious engine failure will cost you a lot more

  8. #23
    apriliaforum Member
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    Perhaps I should expand a bit more
    These engine are great but suffer a shorter life than your typical 4 stroke
    You would normally expect to check your piston and cylinder bore annually for wear and replace as required
    and consider a full rebuild every 15-25K.
    when set up correctly with sensible mods I would say these are more fun than your typical 125 4T

  9. #24
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    Wow tora that would be one hell of a ride
    Within Europe I can say there are a lot of specialist resellers dealing in spare parts for these engines with most parts very easily sourced and shipping is both cheap and quick
    Ebay has a lot of parts but be very careful buying used parts.
    I agree totally with Tora if you really want to enjoy these bike you should have a spare engine ready to drop in. you can pick used engine up from 100euro, but allow for total rebuild 200-400euro

  10. #25
    apriliaforum newb Zastava's Avatar
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    I get that spare engine is a must when beating the bike balls to the wall, but I am planning more on city cruising rather than redline to redline type of thing.

    I think that after finishing school, I will get a proper RS125 project that will be built from the ground, since I will have a car as my daily driver, but right now I want to ride as much as possible after spending so much money, so I will see how that goes.

  11. #26
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    i understand but these can be faster than a 4T 125, my rs50 is faster than my son's Duke 125

  12. #27
    apriliaforum expert ToraTora's Avatar
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    Quote Originally Posted by anotheronetoday View Post
    to dismantle an engine I would say the only tool you have to buy is the flywheel removing tool these are cheap. 15euro
    other specialist tools make life easier but you can do without
    Regarding cost you can buy cranks from 50euro but I understand it's still 50euro
    you would also need gaskets set oil seal set and consider bearings in truth budget 120Euro.
    You can get the flywheel off with simple physics. It's generally better to employ the tool if you have it, and they are inexpensive, but you don’t actually have to have one.

    But what you are very likely need is a gear puller if the primary side is a taper style crank, although physics here can work too. You’ll probably also want a heat gun to remove/install the bearings from the cases. There are other ways like using an oven, but heat guns are relatively inexpensive these days.

    Quote Originally Posted by anotheronetoday View Post
    Wow tora that would be one hell of a ride
    I didn't suggest it as a ride. But you could drive there for the parts.

    I have ridden one of my GPRs about 1/3rd that distance in a day—a very long day.


  13. #28
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    Tora,what is the longest trip in a day you have made?We are located 300km away from sea but i cant imagine to take a ride

  14. #29
    apriliaforum expert ToraTora's Avatar
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    On the rides I organize they will typically be around 80 miles if we go up north, or close to 200 miles if we go south. The most I’ve done in a day on a GPR is close to 500 miles, but these rides are mostly twisties. Not a lot of straights, so it might be better to count in hours rather than miles.

    The longest ride I’ve done in one day on a bike was close to 1200 miles—on a 750 back in the 80s. I actually fell asleep on the bike! I don’t do that shit anymore. Now I count the corners, and not the miles—it’s way more fun that way.

  15. #30
    apriliaforum newb Zastava's Avatar
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    So back again at knocking. Took off the clutch plates and the basked bolt was tight (It was removed and tightened by a simple long wrench). Whole clutch assembly moves very slightly side to side, but I don't think that it has anything to do with actual knocking.

    I think there is nothing else to check besides breaking the whole engine.

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