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I installed my new SBT premium engine with new plugs, rebuilt carbs, pre-mix setup, new Mikuni tripple fuel pump, new lines, new line valve due to previous engine blew hole in # 1 piston due to fuel starvation. The old engine ran great except at wot before it blew.
I did the correct break in and used the break in oil. I have noticed that it will maybe get 5200 RPM and a top speed of 33 MPH. I verified this with GPS. The old engine did over 6200 RPM and topped out at 48 MPH.
It seems to be lacking in power. When I got it home I did a compression test. Shows 90 to 94 PSI for all 3. Seems a litle low. Could this be the problem? It seems to run pretty good, such as not cutting out, just not developing full power.
I did the correct break in and used the break in oil. I have noticed that it will maybe get 5200 RPM and a top speed of 33 MPH. I verified this with GPS. The old engine did over 6200 RPM and topped out at 48 MPH.
It seems to be lacking in power. When I got it home I did a compression test. Shows 90 to 94 PSI for all 3. Seems a litle low. Could this be the problem? It seems to run pretty good, such as not cutting out, just not developing full power.
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