dt 125 lc 1985 power loss

[new2me]

Hi I am very new to bikes and have aquired the above bike but there is a problem with power loss especially when going up hills. Please remember that I know very little!!

[new2me]

After reading into the threads a bit deeper and then looking at my bike I have noticed that there aren't any cables running to the YPVS.
Does this sound like major problems?

[Vincent]

It might be a bit expensive to reinstate the powervalve - it depends on what's missing. Basic electronics are the CDI, which you should have, powervalve control box and powervalve servo. The CDI tells the control box when to open and close the powervavlve which is operated by the servo via two cables. Some models had the CDI and control box as one unit. Performance will be prettuy weedy, esp in the lower rev range without the powervalve working. However, plenty of people ran the bikes with the powervalve stuck open to get past licence legislation.
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Space Is Deep

[ssray]

Dt`s were supplied 12bhp compliant, without the powervalve controller fitted
This loss of power, what happens on the hill if you change down(without over revving) is there still no power?
First thing would check and possibly replace the plug, then air filter then clean out the exhaust
Ray

[new2me]

thanks for replies I will look at it tomorrow and see what happens, what sort of money do you think if all ypvs needed replacing/?

[Vincent]