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burton500

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Posts posted by burton500

    DT 175 now sold

    in Dual Sport, Offroad Bikes

    Posted

    Hi

    I restored a DT from a pile of junk to quite a looker, to the extent is was too good to take off road. Sort of defeated the object really, but anyway, have just sold it.

    So first of all, thanks to Airhead amongst others for technical advice when asked for. Secondly I put it on ebay at £1250 buy it now, and it went in under 4 minutes, so although I've cleared a bit of profit which was never intended, it looks like prices are buoyant.

    Cheers and au revoir

    Lee

    013dm.jpg

    beforecz.jpg

    DT175MX throttle cable

    in Dual Sport, Offroad Bikes

    Posted

    Hi, need a bit of advice about the square junction box on the throttle cable. Where the oil pump cable and the carb cable meet, there is a white round plastic housing. Is that round housing supposed to be able to rotate?

    My one gradually gets pulled in one direction, so that eventually the bike won’t tick over below 2500rpm, because the cable is being pulled tighter.

    The Haynes manual doesn’t appear to help, so wonder if anyone here has had this happen.

    Cheers

    Lee

    DT 175 MX main jets

    in Dual Sport, Offroad Bikes

    Posted

    Damnn yes Lee your bike will be running lean. if your aibox is the more modern one accessed from the left of the bike you need a 3U500 carb...and its not just the main jet!! also the needle and needle jet, pilot jet and the throttle slide cutaway are different. This is because the later air filter box is a less restrictive one as compared to the early version.

    Hmm very odd. I do have the correct left hand air filter for my model. However, it looks like my bike has the early carb on it then, but with a main 160 jet fitted. I best double check what the other jets/needles/slide etc are!

    dt175mx main jets

    in Dual Sport, Offroad Bikes

    Posted

    Hi

    I've got a 1981 DT175MX. The carb on it, which I believe to be original, is model no 2H501. My Haynes manual has the spec for a 2h500, but not the 2H501.

    What I'm trying to confirm is the correct main jet for this particular carb. The bike came with a 170 fitted, and I reckon that's too rich - the bike struggles to get through 6000, but once through 6000, it takes off. Depending on what you read, it seems 130 or 160 are possible std sizes.

    Obviously once the main is sorted I can then fine tune the needle setting.

    Anyone able to help?

    Many thanks

    Lee

    DT175mx main jet

    in Yamaha Workshop

    Posted

    Hi

    I've got a 1981 DT175MX. The carb on it, which I believe to be original, is model no 2H501. My Haynes manual has the spec for a 2h500, but not the 2H501.

    What I'm trying to confirm is the correct main jet for this particular carb. The bike came with a 170 fitted, and I reckon that's too rich - the bike struggles to get through 6000, but once through 6000, it takes off. Depending on what you read, it seems 130 or 160 are possible std sizes.

    Obviously once the main is sorted I can then fine tune the needle setting.

    Anyone able to help?

    Many thanks

    Lee

    busted spoke,

    in Dual Sport, Offroad Bikes

    Posted

    Anybody got some realistic soloutions, am i right in thinking that one busted spoke may well be the beginning of the end for the rest of em?

    I had a spoke go on one occasion, so I just replaced that one spoke. Was never a problem thereafter. But as you say, the longer you leave it, the more chance that the others will start going.

    Lee

    Easy question for DT owners

    in Dual Sport, Offroad Bikes

    Posted

    The brand new bloody coil was bad. I decided to swap in a running DT125 and when I did she didn't run anymore. The only thing different was the coil so I swapped it out. Started on second kick. Swapped the DT175 back in with the coil from the DT125 and same thing started on second kick. First time I've had a brand new coil be bad. Really threw me off by giving such a good spark when holding plug against head.

    Was this a genuine Yamaha coil, or a pattern? Would be handy to know what to avoid.

    DT175MX 1981 electrics

    in Dual Sport, Offroad Bikes

    Posted

    Got there in the end - thanks for the help OG. It turned out there was a partial break in the red live wire somewhere between the rectifier and the conector in the headlamp. Although the reading was 3v, as soon as a load was put on the circuit it went to nil. Anyway, I've run a new wire from the rectifier to the connector in the headlamp, and all is well.

    DT175MX 1981 electrics

    in Dual Sport, Offroad Bikes

    Posted

    , make sure you have 6v arriving at the Red (socket)

    Right then, 3 volts are going missing somewhere. There are only 3 volts arriving on the red wire in the headlamp shell. Weird. Would the rectifier cause this? Also, is there supposed to be an earth off the battery?

    DT175MX 1981 electrics

    in Dual Sport, Offroad Bikes

    Posted

    Ok then, having completely refurbed the DT, got it mot'd, I'm now rediscovering my youth bouncing down the green lanes. Yumps, berms and streams, I'm still cocking them all up. However, something went wrong with the electrics yesterday, in that there aren't any.

    Battery has a full charge, and the main fuse is fine. Engine starts no problem, but lights, horn, indicators and instrument lights are completely dead. All connectors were corrosion free following the rebuild. I guess something has come loose somewhere. Any suggestions on where to start? Any help gratefully accepted.

    Lee

    Dt175

    in Dual Sport, Offroad Bikes

    Posted

    Hi all, i am putting the carb back to gether after having it cleaned and cannot find the float level needle or now remember if i took one out. I have looked in the parts book and it does not apear to have one. is this correct? Dt175mx 1978. Hopefully the manual will arive today and give me some help.

    It does have a float valve - I reckon they include it as part of the float valve assembly - see http://www.cmsnl.com/yamaha-dt175h-1981_model8795/partslist/A-12.html

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