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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: TimTyler on May 11, 2013, 04:54:52 PM

Title: Timing a K75
Post by: TimTyler on May 11, 2013, 04:54:52 PM

I've read http://skylands.ibmwr.org/tom/tech/k75_timing.html (http://skylands.ibmwr.org/tom/tech/k75_timing.html) and the Timing Advance (http://www.motobrick.com/index.php/topic,3584.msg21489.html#msg21489) thread here.

Once the HES T-cover is removed, is there a timing mark that can be checked through that gap in the HES with a standard timing gun?

Title: Re: Timing a K75
Post by: TimTyler on August 15, 2013, 11:05:02 PM

Finally bought a cheap timing light.

Followed the info at ibmwr.org and using a protractor image on the laptop, marked a 30 degree line on the disc.

After a few tries rotating the HES sensors I was able to get the 30-degree scribe to line up with the crankcase arrow at 4000rpm. At idle the notch in the plate is probably 8-10 degrees from the crankcase arrow.

The engine sounds smooth but I'm a little concerned with the positioning of the HES. For the last 30k miles it's been lined up symmetrically with the U-notch in the engine block, but now it's not. Should i be worried?

 

Title: Re: Timing a K75
Post by: wmax351 on August 16, 2013, 12:54:28 AM

I just set the timing precisely for the first time since my rebuild. That's almost exactly where mine is set up for 33 degrees at 6000 rpm.

Title: Re: Timing a K75
Post by: vintagemilano on August 16, 2013, 05:06:28 PM

Mine looks the same as yours, did it just a couple of weeks ago.

Title: Re: Timing a K75
Post by: TimTyler on August 16, 2013, 05:24:44 PM

Okay, cool.

Thanks, guys.