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The "swirl effect" is made by reshaping the transfer ports or adding spiral finger ports to better help deliver the fuel/air mixture into the combustion chamber and exhaust exit. Willard.

Good questions here guys. I'm no expert on the subject, but I remember when I built my Yamaha 125YZ bikesaw almost 30 yrs ago, I bought a brand new cylinder for it and noticed the interior walls of the exhaust port had a dimpled surface of what looked like a thick coat of black paint. I checked...

Relax inbred, take the derails like they were a coffee break during shop class. Take your time and fit in with the flow here. See your already on track your talking about a muffler mod with a phillips screwdriver, we'll just help you fine tune that a little. Willard:D

Ok we are now on track. Willard.:D

Derail yes but always good for a change.:lol: Here is another photo of the Stjordal "Helleristningers" unpainted [thousands of them] Willard.

As mentioned on the Peterborough sites "solar boats" a stylized shaman vessel with long mast surrounded by the sun is typical of petroglphs found in northern Russia and Scandanavia. Books have been written that these boats resemble ancient Swedish viking ships that may have traded for copper...

My grandfathers farm is on the banks of the Stjordal River [40 lb salmon caught regularly] and between the house and river is the railway line from Trondheim to Stockholm, Sweden. Here is a photo of a Norwegian gernade stuck in a wall of a farm house down in the valley that was occupied by the...

Thanks for the link Stig, it will be a fine book to own. Here is 3 photos from Norway I took in 2002. First is my grandfather's house built by his grandfather in 1845, all wood and great shape, beams cut with a broad axe. Second photo is my grandfather's brother's grandson [my cousin] Anders...

I'm showing a photo here of my Husqvarna 395XP and Stihl 090AV. Notice the difference in the two clutches. 3" diameter on the 395 and 4" on the 090. The 090's is twice as wide too along with clutch shoes that have a automotive brake pad type of material on them. I should have put the 346's and...

That is an amazing photo Stig. Looks like a 2 foot square by 100 foot long timber. Would last forever as a bridge beam. There are very few today who can handle a broad axe like that or have the will to do it. 1000 years before that photo was taken Craftsmen from Norway, Denmark and Sweden could...

Speaking of ripping some of the toughest wood in the world, I never get tired reading this story. Willard.

I was thinking old school......084. I guess the 880s learned a trick from the big brother 090. Willard.

I explained that in my last post. These cull rolls were too long to fit into their repulper so they hired me to cut them in half. I was the only guy in the country with a saw this big. Bar oil doesn't do anything to the paper because the roll is broken back down with a chemical process and all...

Our Tolko mill where I'm cutting the rolls with my 090 is only 2 of such mills in North America the other is in Washington state. We have older stronger fibre making better quality SPX paper. I was cutting these rolls in half so they could fit them in their re-pulper because these rolls were...

Yep toughest thing I ever cut. No ordinary paper either. Made from 100 yr old northern Manitoba black spruce pecker poles. Theres about 1 mile of paper in that roll. Weighs over 6,000 lbs. This pulp/paper mill has been making paper without a break since it opened in 1969. Back then it was a...

While cutting paper rolls at the local papermill I had to outfit my 137cc Stihl 090AV with a 60"bar and .404 semi chisel harvester chain. On a good day my worker and I would cut over 40 rolls with 5 gal of gas 2 gal chain oil and up to 5 minutes WOT for each cut. The 090 never missed a beat...