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kiln

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Posts posted by kiln

    DT175 mono shock upgrade

    in Yamaha Workshop

    Posted

    Tank you Airhead, for the quick response.

    I see about an inch needs to be cut on the spacer inside the spring and looking at the pic posted I can estimate the extension to be about an inch, would you agree on my estimation?

     

    DT175 mono shock upgrade

    in Yamaha Workshop

    Posted

    Digging this up through research......

    #Airhead, is there any change you could perhaps scan those install documents to a downloadable PDF file with dimensions of the Bushes, Allen cap bolts and "extension piece" please?

     

    DT175-blow back through air cleaner

    in Yamaha Workshop

    Posted

    Hi all, Today i have opened up the air cleaner box with a 25mm hole and it made a huge improvement. :hyper:

    Then I started tinkering with the timing. :spin2:

    I moved the plate with the coils about 4mm clockwise and then checked the flywheel timing with a strobe light.Found the flywheel centre line exactly tdc at 4200rpm and after that, moving anti clockwise as the revs climb. Is this correct? By moving the coil plate clockwise is the timing retarted or advanced?

    RS100 6v to 12v conversion

    in Yamaha Workshop

    Posted

    Rosa, I am not sure which post you read, but here is the link.

    You need not do anything to the stator, without any regulators it cranks out 19v +

    I still run with my conversion as mentioned in the post and I still use the same battery and 12v lights.

    DT175-blow back through air cleaner

    in Yamaha Workshop

    Posted

    In the mean time......Found a spare reed block with original parts.

    My question then is: If the fibreglass reeds only last a short while is it not worthwile to keep the original steel ones?

    When would one consider replacing the original steel ones, i.e. after how many km's or would the telltale signs also be "blow back"?

    Thanks in advance for all the advise.

    DT175-blow back through air cleaner

    in Yamaha Workshop

    Posted

    Hi kiln, not seen you for ages fella...Greetings

    of course your boyessens are fooked !, get some nice flat standard ones back in there, or some hy-tec ones from yambits

    Hi Oldgi...ergh Airhead. Thanks. :hyper:

    I have been busy riding a KLR650, but now and again I jump back on one of the DT's. I will change to a spare reed set and of course I will get the Hytech ones from Yambits. Yambits served me well in the past and I can also recommend them. I have a 1988, DT50 to rebuild for my son so I will be asking help on the forum in the future.

    DT175-blow back through air cleaner

    in Yamaha Workshop

    Posted

    I have noticed recently that there is a huge air blow back through the air cleaner when i left a cover screw off. The air becomes much more obvious when revving the engine. I have Booyesens reeds installed and they are sealing properly from what I could observe. Is this normal for a 2-stroke or is there a fix of some kind? Is this detremental to the bikes performance? Any suggestions?

    1979 DT125 gearbox ratios vs. sprocket ratio's

    in Yamaha Workshop

    Posted

    I sure hope that everyone can voice their opinions about the topic at hand.

    My setup is as follows: Gearbox standard, front sprocket =15t and rear sprocket=47t. New carb with standard jetting and K&N air filter. Boyesens reeds. New OEM piston & rings. BR8EIX spark plug. Standard exhaust & tailpipe.

    The bike starts fine and rides with a lot of torque in lower gears. But when riding up to 5th gear, the revs pick up nicely and goes 8000+, yet when changing to 6th gear, the revs drop to 4500 with WOT and speed drops progressively as well. When in top gear going at WOT there seems to be a willingness to go faster but it feels like brakes is applied, going at 3/4 throttle a feeling of just cruising is at hand but there is no desire from the engine to go faster.

    Do I open the bottom end for a bearing replacement exercise or would you recommend that I change the front sprocket to 14t or the back to 49t? Any suggestions welcome and if possible I will try to test them in the coming weeks and keep the post updated.

    DT175 low km carbon buildup

    in Yamaha Workshop

    Posted

    Original carb has 125 main jet and 22.5 pilot jet, Y jet needle , 2.0 slide and carb has a 4hc20 stamp on it.

    I have found a solution though. :eusa_clap: I bought this carb (b in previous post) and installed a 25 pilot jet, 160 main jet and 2.0 slide with 5G4-3 jet needle( http://cgi.ebay.com/ebaymotors/_W0QQcmdZViewItemQQ_trksidZp3984Q2em1439Q2el2649QQitemZ180408901679QQsspagenameZSTRKQ3aMEWNXQ3aIT ).

    Now the bike can idle easily and even the choke won't bog it down. This Kei Han Taiwan replacement carb is highly reccommended since with a bit of tweaking it can even be used for a DT175(Tested on DT175 and now on DT125) .

    Thanks to all that is always willing to assist with advice. :icon_wink:

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