Engine

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  seals
  • britshgigolo  

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  @britshgigolo make sure that you get the right width bearings as the original are narrower than the typical ones for the DT's diameter
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  Athina 170cc bore kit recommendations
  tuning 170 bore kit jetting athina 170 • • harveymg  

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  @Irongamer727 that's really bad! im going to take everyone else advice and get a 4FU or 3MB cylinder instead with a aftermarket pipe and carb
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  Left side leak
  • jakeyboy  

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  @Calum isn't there a metal spacer as well? They can wear too if fitted and leak around the seal
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  CRANK BEARINGS !!!
  • jackthestripper  

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  @DTR-NSR yes they are narrower. Found out the hard way years ago when I couldn't get my cases back together......
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  Bogging when revved quick
  • Bananper  

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  @Bananper Get yourself one of these bud, give it a good swish around the bottom end and hopefully you will pick up any loose fragments; https://www.ebay.co.uk/itm/Flexible-Shaft-Bendable-Magnetic-Pick-Up-Tool-With-LED-Light-And-Strong-Magnet/391962870896?epid=15017009964&hash=item5b42cec470:g:L00AAOSwR0JUO~Ya:rk:720 Also change your oil 3-4 times within the first month after the engine is rebuilt, just to flush out any remaining debris.
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  Bought DT125X, cannot get it to start? Spark, fuel OK
  engine dt125x • • Lorant2  

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  @NINJA Thanks, I have to get the A1 licence now But the summer will be definitely fun!
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  Pre Mix Chart & Calculator
  • NINJA  

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  Yeah, most use 2% as a rule of thumb I saw a chart on the auto-pump back in the days, as I recall it pumped out 3-4% af WOT, and way less just idling or at low throttle operations. Kinda shows you the beaty of the auto-pump. Some info here: http://www.dansmc.com/2_stroke_oilpump.htm
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  Hmm now what (A Rebore!)
  • Pablo13  

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  @Pablo13 Got 4FU heads as well, squish is noticeably different on them. And the SP heads, which are O-Ring???
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  Quick question regarding oil.
  • jakeyboy  

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  @Irongamer727 Twas what ever was in Motorworld at the time and cheap. And has always worked fine for me.
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  What clutch for a WR200 conversion?
  • Bluestoesonnose  

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  @Louis-James said in What clutch for a WR200 conversion?: The ebc heavy duty clutch. Use bandit 400 clutch springs
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  Torque
  • jakeyboy  

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  @jakeyboy See here; http://www.dt125.cz/download/Service_Manual-DT125R.pdf
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  Somethings leaking :/
  • jakeyboy  

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  @declan thanks for clearing that up
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  125r and 125re cluch casings
  • stinkwheeler  

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  @DTR-NSR Yeah true, early clutch covers have different oil pump housings.
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  DT125 crank seals ?????
  • HondaLover  

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  @HondaLover Yeah try giving me a photo of the pump, not the cover. I actually don't know how to adjust the early type pumps. The newer types you can just adjust a threaded bar. I had an early type pump just inject way way too much oil. Never figured out how to fix it, just deleted it in the end.
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  High Compression Questions
  • NINJA  

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  @NINJA Hey, that's looking very tidy!
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  Coolant problem
  • Bananper  

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  Might sound silly but you are using a genuine head gasket or an Athena one yes?
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  Gear selector/lever
  • Bentley  

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  @shellatit Dependant on what you're looking for there are many gear levers for other bikes which will fit the DT. There are also many aftermarket levers as well as OEM levers which are of a similar shape to the DT's. I would suggest that you search on ebay or motocross/enduro websites and look for a lever of a similar shape. Or search for dirt/pit-bike levers as they seem to be 10_a_penny. So long as the shape, length and spline sizing are correct, then it will fit with no issues and there are many to choose from. For example I couldn't find a decent one for my Aprilia MX 125 and searched as described above and eventually I found this bad boy, which fits perfectly and looks the mutts_nutts too!!! https://www.ebay.co.uk/itm/Gear-Shift-Lever-Pedal-for-Kawasaki-ZX-14-ZX-14-R-ZZR-1400-13156-0075-/273580239613?hash=item3fb2a72afd A nice quality kick start lever such as these, would match that gear lever and look awesome too; https://www.ebay.co.uk/itm/KICKSTART-KICK-START-STARTER-LEVER-ASSEMBLY-16mm-SILVER-KAWASAKI-KX250-78-79/323344657018?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D2%26asc%3D52945%26meid%3D3035e420555b47258fccbcfc6716735b%26pid%3D100011%26rk%3D3%26rkt%3D11%26sd%3D223065008596%26itm%3D323344657018&_trksid=p2047675.c100011.m1850 https://www.ebay.co.uk/itm/FORGED-KICK-START-LEVER-THE-STRONGEST-KICKER-ON-THE-MARKET-16MM-shaft-dirt-bikes/283101055850?hash=item41ea234b6a:g:dJAAAOSwAV5bcReW:rk:10
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  Aprilia Rs 125, Which Power Valve should i choose?
  • pedrobatista10  

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  @Calum I only posted that link as it was a complete kit, individual parts may be sourced for less cash in total? I just wasn't sure what/if he had any parts already???
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  Is someone able to get me a portmap for the stock cylinder(either 3mb/bn/4fu)
  • DanRacing  

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  Loctite or no Loctite, that is the question
  • Bluestoesonnose  

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  Stuff inside the engine cases I always use loctite. Last thing you want is a screw coming loose and rattling around your clutch or something. External stuff I don't bother so much, as that's easy to enough to spot and rectify.