Nice work.
I've been lurking in this thread and waiting for you to get this installed.
Defiantly something I would like to put on my bike.

What head is that? Webco?

Thanks - Yes it is a Webco head. Painted a bit, but otherwise just a Webco.

Daily Update:

I took the bike for a 20 minute ride today, and am really, really happy with the results so far. Nice throttle response and the Sleeper Pipe seems to do exactly what the boys said it would. Pulls solid from about 2,500 all the way up to about 7,500. It doesn't peter out there, just slows acceleration a bit.

As I said somewhere, the narrower PowerDynamo unit does not require a different stator cover, but the narrower CT1 or AT1MX stator cover will save you almost 2" of motor width!





CT1 stator cover on the left and AT1 original cover on the right.


AT1:





And the CT1:





I have the side covers hanging up to dry with fresh silver paint (stock color for the 1970) drying on the covers. I was tempted to polish them all up, but am too lazy with too many other projects on the table right now. Maybe a winter project.

Covers will be installed tomorrow, along with a nice shiny factory fresh CT1 shifter (narrower) and a brandy new, NOS Chrome Kick Start Lever. I decided to kind of finish out the sprucing up on the bike this time around as I expect to put a few miles on it this summer.

The full install story is still being written and will be a separate thread soon.

"I took the bike for a 20 minute ride today, and am really, really happy with the results so far. Nice throttle response and the Sleeper Pipe seems to do exactly what the boys said it would. Pulls solid from about 2,500 all the way up to about 7,500. It doesn't peter out there, just slows acceleration a bit."

Mako glad your happy......we designed our Sleeper Pipe mod to have a nice wide powerband so the added power is very useable for the rider no matter what skill level and terrain.

Bassani, Hooker and many others were very good at making top-end 125/175expansion chambers....

Our 175 sleeper pipe mod in contrast is designed to give solid lowend and midrange power...along with good top-end pull...especially over the stock pipe.

If your looking for a top-end screamer a true expansion chamber is the way to go.

The way most us use and ride our enduro's the sleeper really compliments that style of riding.

I would agree with that assessment. The Torque Engineering pipe gives more of a full on race bike feel - especially on the top end. It really screams. It is also really loud, and leaves a bruise on my inside knee due to it's width.

The sleeper pipe looks better, and fits the rider better, is almost stock sounding and gives a huge power band more similar to a stock band, but noticeably stronger throughout.

The quality of your work is really nice too. The surgery is invisible unless you remove the pipe from the bike, and it got a nice fresh coat of high heat black, and even a new baffle screw! If you had wrapped it in black and yellow paper instead of the plastic, I would have thought it was a factory product!

I will be posting up more pics of each of the parts I installed with a few more tweaks coming.

Thank you again!

Some Saturday bike porn.



Side covers painted, air cleaner installed, NOS shift lever. My clutch stiffness ended up being a small rock in the mechanism, but a bit of grease in the activator and cable lube made it quite acceptable.




Posted from my iPhone from the Wild!

Sleeper pipe installed. No visible indication of the modification except for the rider's smile!

Also treated the bike to a NOS shines chrome kick start lever.


Posted from my iPhone from the Wild!

Very nice Mako !

What gear you have on the front......with all the power you can easily run a 17/ (45) and still trail ride anywhere !
17/42 would be good if you were doing more road riding....

For reference DVM and I run
17/39 for highway and
16/39 for combo trail and road....and
15/39 for steep trails on our hot rod 175 setups.

A good running 175 can handle much taller gearing even in the dirt.

I need to check as my first gear is so short as to be pretty much useless. Still some tweaks on that coming, but I am thrilled with where the bike is at!

That is one sik ride,don't forget to rejet