Athena 170cc questions
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Current bikes:
DT125X '07
Street Triple R '11
Aprilia ETV1000 '02Previous:
DR650RSE '96
FJ1200 '92 -
@finnerz89 why would the 170 kit affect the gearbox ?
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@irongamer727 More torque than what was initially designed.
The box is pretty over compensated on these bikes, I'd still say 30k is low.
I suspect the bearings failed, which in turn damaged the box. I'd expect that to happen. Again if the bottom end was rebuilt as per maintenance then that would have been avoided.
It's the first I've heard about gearbox going due to the Athena kit.
With that in mind, I shouldn't worry too much.
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Allright. Every part has arrived. Now. Once I installed the kit and put a big main jet and lowered the needle(more fuel). Should I start it and ride 500 km with the settings way off?( way to much fuel) Or should I lower the jetting until he rides okay? Thing is I don't won't to put any stress on him when the kit just has been installed. How would you do?
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@irongamer727 sorry I know you are asking important questions but did you just refer to your bike as a “him”
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@irongamer727 You're going to want to ensure you jet it properly and ride it accordingly.
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@declan said in Athena 170cc questions:
@irongamer727 sorry I know you are asking important questions but did you just refer to your bike as a “him”
Haha haha! Careful, this day and age your bike should be "gender neutral", don't force sexuality on your bike, let it choose or you are going to be on Jeremy Kyle!
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Read my question again. I'm going to jet it. I know 90% of people use either a 270 or 280 main jet. My plan is to adjust the needle. (As rich as possible) and put a 290 jet in to begin with. But I presume 290 will be to big. It's just to be on the safe side. The tricky part is that I cannot just rev him and see if 290 is to big right? Not until the cylinder has done about 500 km. So either I drive the first 500km with a way to big jet and risk destroying the spark plug and stuff due to the co2 build up. Or I try reving him early to adjust him before the 500 km. That's the dilemma.
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Yeah I read it.
Did Athena not provide the correct jettings with the Cylinder kit. That is my gribe.
How could they develop a kit and then not recommend some jettings for it lol.
If we're talking all honesty here.
Get her running sweet on idle, not in gear (you can rev the nuts off it and it won't damage anything provided there is oil) and just make sure it's all good.
Then run her in gently, then sort the jetting out on WOT using the described plug chop methd.
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Allright. I agree. Jets should be accompanied with the kit. Another question. After i fitted the kit. If "the bike" starts with no problems. Should I worry about the idle mixture? Or just keep going? Don't won't it to break down due to a lean idle mixture. Is that even possible?
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@irongamer727 If the bike idles happily, and you pulling the throttle doesn't cause hesitance or bog, then the idle mixture is correct. I can't see the idle mixture increasing massively, but definitely should need to be notched up slightly.
For the running in period, you shouldn't actually need to up the main jet, as you should be hitting WOT. But I'd rather have it and not need it, than need it and not have it.
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@calum The bike is running a bit lean with stock pipe so I will definitely change main jet and adjust the needle. Too bad the needle only has 3 positions.
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@irongamer727 Well needles are readily available.
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@calum any recommendations? Stock mikuni 28 dt125x 2005
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@irongamer727 Yeah I'd recommend jetting it to suit.
I don't run that carb, the only experience I had with the Athena was when my brother ran it on his DTR and he ended up with a vastly too big 38mm Kehin Carb
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@calum so you don't think I need to adjust the needle that much? Rather finding a good jet?
