Engine compression results

Recommissioning the 6 plug racer today, has sat for 15 months. Did a comp test out of interest. 180 psi on all 3, dry, wot.
After talking about the tommaselli clip ons, I cracked one, bummer. Back to jota bars now
 

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Dellortoman said:
The 3-1 that came on my bike wasn't a factory item. It looked like it was cobbled together by someone who had a pipe bender and some basic welding skills. For example, the flanges where it bolted to the cylinder head were cut out of steel plate and were permanently attached to the pipes. The whole thing was one fully welded assembly from beginning to end. I don't think any consideration of gas flow went into its design. If the only design criterion was to get the exhaust gas from the front of the engine to the back, then it was a success. But as a performance upgrade or a noise reduction device, it was a dismal failure.
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Ditto Cam, from your words and what i had here, someone was making a one piece three into one "Exhaust System" with permanent plate steel flange clamps. Black finish, hung them on the fence, and in about 12 months had dissolved into neat piles of corrosion, of the era device of no value at all, to my sensibilities at the least.

There was one exhaust system that did impress me a great deal, a three into three along the lines of that Black and White bevel twin and a "curve linear" type silencer. A Similar design on the series 1 180, the ground actually vibrated under the triple even at idle. Red knows the engine and exhaust system am indicating, original to the faith Laverda man built it up. Made a pattern of the silencers. Be complex to replicate. j
 
martymoose said:
Recommissioning the 6 plug racer today, has sat for 15 months. Did a comp test out of interest. 180 psi on all 3, dry, wot.
After talking about the tommaselli clip ons, I cracked one, bummer. Back to jota bars now
Click to expand...
Always concerned me the large radius adapter plates on the front brakes, having spent many hours over that bike and engine, ( the doner head came from my "reserves" here ) the adjustable cam sprockets, also a donor pair from me, not sure if still fitted Martin? The Keihin carbies were way more trouble than ever could be worth, though Mr D did obtain excellent fuel economy for a performance motor. Seems another transformation is happening to that bike, Captain Marty at the helm... good sailing there with project....j
 
It's a huge fun thing to ride and bloody fast to boot and handles really well. Hated the stupid central dash start button thankfully Marty removed it. You couldn't hold the clutch in and reach it if the bike stalled in traffic.
 
Hi John. Motor specs untouched from yours and Doug's build, new ignition unfortunately as yours died, smashed pickups. Doug's micro wire loom had to go, machine is going to get a thrashing this year!!!
 
martymoose said:
Hi John. Motor specs untouched from yours and Doug's build, new ignition unfortunately as yours died, smashed pickups. Doug's micro wire loom had to go, machine is going to get a thrashing this year!!!
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Mr D and myself swapped bikes, i was on his ( now yours ) and he on my TLR1000, of course we took it easy, well... we pressed the starter buttons easily, after that is was pinned throttles, around the 220 mark we both spotted a spill way dip on the road ahead, his rear end ( not the TLR ) was higher than his head, then it was my turn, scrubbed off 40k's and hit the dip at 180 or so, cleared the dip entrance then the front wheel hit the other side of the dip, full front end compression, dont recall much after that, other than i can type this message, so must have survived from sheer skill and astute acumen, or maybe it was just sheer arse and on board as passenger... you cannot have bad luck all your life, its not possible, can run out, all the same. Does it still have the 17 inch wheels or am i old news there.... its great fun if you like being scared....j
 
Vince said:
It's a huge fun thing to ride and bloody fast to boot and handles really well. Hated the stupid central dash start button thankfully Marty removed it. You couldn't hold the clutch in and reach it if the bike stalled in traffic.
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The throttle cable ( push pull ) jammed open as i turned into the driveway ( steep ) and i came so close to hitting a full size federation style brick and earth front fence, massive torque, only saved by fortunate thumb on run.stop, another great save from the great riding skills, what else could it be... seem only to have 1 or 2 lives left out of nine..... took me a week to learn how to blink again, my eyes were well open... oh the throttle cable assembly was caught in the steering geometry as i hard turned...
 
martymoose said:
Recommissioning the 6 plug racer today, has sat for 15 months. Did a comp test out of interest. 180 psi on all 3, dry, wot.
After talking about the tommaselli clip ons, I cracked one, bummer. Back to jota bars now
Click to expand...
Interesting side covers. Post a full pic when able please!
 
I had similar when running those CV Kehan Carb kits made years ago by Doug Home. I think Marty's 6-plug bike incorporates a bigger volume airbox than Doug made for me. There a giant pain to fit I know as there as tight as it comes sliding in and then it leavers forward connecting over the carb mouths with rubber engine oil seals that again as tight as possible. Those carbs run like crap without an airbox. Typically back then I had constant issues including one memorial trip where the plastic slides melted and jammed fully open, my guess is it also had cam timing issues allowing combustion gasses back to the carb. Marty's bike, similar to mine and Doug's bike, this 6 plug one has been virtually trouble-free. I got sick of the hassles and went to Reds Mikuni KIt with way fewer issues since. I guess also my bike had a hard life before I got it, it had a drilled-for lock-wired sump and other nuts as well and apparently had a race history and had lots of issues over the years.
 
martymoose said:
Here's a couple of shots. Side covers where one off creations by Doug. I showed the molds to TC over Xmas, he reckoned they where junk, so after storing them carefully for 10 years, I threw them out a week ago.
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Curious how some bikes look fast even when standing still ... (y)
 
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