Engine

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  Gearbox Bearings
  rebuild size bearing code gearbox • • Calum  

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  Athena 170cc questions
  • Irongamer727  

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  @jackreece show a picture with your tm32 installed. The float bowl needs to be pretty level. Because of how the DT engine and intake is, some carbs will sit at a angle
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  Ypvs servo motor
  • Arild  

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  @Louis-DT-WR Thanks mate, ill have a look
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  The worst dt engine on ebay
  • declan  

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  @Challenger yeah I really wanted it to either be the graphite colour or just the standard silver but it’s all the paint I had or could get during lockdown so is what it is
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  What piston?
  • SpookDog  

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  Yamaha TZR125 DTR TDR 125 Wiseco Piston Stock 56mm Bore 679M05600 on ebay aint bad at all either they range .5mm and have 8 stages u have to have a rehone though to be sure u aint blowing your funds
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  Powervalve YPVS
  • Stevie Wonder  

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  2T oil feed
  • SpookDog  

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  Also, does the block breather pipe connect to the carb just behind the fuel in pipe? Cheers peeps!...
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  Power valve o rings?
  • SpookDog  

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  Hey! You weren’t wrong, there is a paper gasket. I was wrong about the oring though. It’s to big for the coolant pipe
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  Clutch conical spring washer
  • SpookDog  

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  What one are you on about? https://www.fowlersparts.co.uk/parts/4189513/dt125re-1d02-2005-030-a/clutch Can you not just use something like this? https://www.toolstation.com/spring-washer/p83526
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  Gear lever oil seal
  • jonne123  

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  Just done the one on my 3SH - when you put the new one in make sure that you cover the gear lever shaft with tape so it does not damage the seal when you push it through. Budget for a new clutch cover gasket and oil as well. BTW do not lose the clutch ball bearing!
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  Dt 125re Right hand crank seal help
  • Baileyboy2008  

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  I did my mains recently and one of the seals was tight. I had to clean it up a bit with some really fine wet and dry, just to kinda deglaze it. Lite smear of grease on the seal and it went in easy. Don’t forget the right seal is one sided. It should have outer wrote on one side. Also it doesn’t go all the way in. It sits flush with the outer edge (or it does on mine 1988 3bn). It shouldn’t be a bear to fit cause it’s only the outer that’s touching anything, unless you left the spacer in the crank. You just need a longer tube to drift it...
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  Piston blow by
  • lllDennis  

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  You really need to check the back of the piston that isn’t exposed to exaust gas at the manifold. The piston skirt is exposed to the ex manifold on the upstroke.
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  Reed valve stopper gap
  • Nottsbiker  

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  Clutch bell
  • SpookDog  

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  Easy job. Put it in a vice with a small wood block to take the pressure off of the ‘fingers’ (also used to support the end of file to keep it square) and breezed it. Didn’t even need the wig🤪 Finish off with a flat needle file & wet n dry... Just needed the confidence that people have done it before and it’s doable...
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  Fresh Rebuild - Black Grit in oil
  • liquid-snake  

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  I should clarify, 4T oil in the transmission fluid. Gear oil in the Aprilia though
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  3BN 3pin YPVS Conversion
  • SpookDog  

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  As far as I am aware only one drive pulley, all mine early models.
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  Wich way does the athena 170cc piston go?
  • Haako Smith  

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  Ok, thank you so much, just got a little worried that i had It the wrong way
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  Bearing pullers?
  • SpookDog  

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  Just do it when no one else is home
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  Engine hole
  • jonne123  

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  Someone at Yamaha put it there for a laugh so people for years would ask whats this hole for?
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  Cylinder/exhaust problems
  cylinder • • Oisin  

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  @SpookDog said in Cylinder/exhaust problems: I’d be interested as well, specially if you have the head to match... Me? If so shoot me a message bud, they all match and they’re even the same pair that come together in Italy nearly 30 years ago