1977 Ducati 500 GTL Cafe Racer – Page 3

16 Jan 2015 | Author: | Comments Off on 1977 Ducati 500 GTL Cafe Racer – Page 3
Ducati 350 GTL

Thread: 1977 Ducati 500 GTL Cafe Racer

Originally Posted by lucky13cycle

You are unbelievable. You figured out my plan I’ve been sitting here trying to figure out how to surprise a new audience, you have got to be kidding. I should get whatever is lodged up my ass. You posted 5 times slamming my project after my first post. I was trying to share something that I am proud of with more like minded motorcycle people.

As far as details about checking the engine out. Sorry I didn’t give you enough details. I am just giving a overview of my build not trying to write a tech manual on how to check and rebuild a engine. As far as cosmetics I not only did made the bike look good I made the rearsets, I cut the original hoop off the back of the bike and bent and welded a new hoop, I rebuilt the forks, I rebuild the brake calipers, replaced all the bearings in the neck and wheels.

I relaced both front and rear wheels with stainless steel spokes, I did some rewiring, the list goes on. As far as the engine here a list of what I did since your so interested.I removed the bolt that is just in front of the left cylinder, as you sit on the bike. This is the restrictor for the oil feed to the cylinder head and makes sure that the oil pressure is backed up to the crank.


Ducati 350 GTL
Ducati 350 GTL

I took off the alternator cover. Below the alternator you will find the oil pressure relief valve, this takes the form of a steel tube with a ball and spring up it I took it out cleaned it up and then put back with loctite and then wire lock it. I checked that your oil pressure warning light was properly working. The Cam chain do stretch and flap, because the tensioner is not very good.

I pulled the rocker cover off and checked the tension. I checked the depth of the recesses to take the O rings that seal the main oil galleries between the two crankcase halves. If they are not recessed it will cause weepage out through the gasket.

I took the bungs out of the crank for the big end sludge traps these traps were full of muck and would have starved the big end shells of oil flow. On the camshafts, which are in two parts, Ducati saw fit to block off the hole for the oil feed to the cam lobes with a dished washer like a water jacket core plug. These were never designed to take the pressure of cold 20/50 oil on them and can blow out, leaving you with no oil feed to the top end!

The solution was to put the cam in a lathe and bore the end to take an aluminum bung and fit that bung with loctite and face off, so that they press together and can’t go anywhere. I also checked the end float on the crankshaft for slop. This is adjusted by placing shims behind the LH main bearing, This stops sideways movement of the crank across the face of the main bearings and will reduce wear.

Ducati 350 GTL
Ducati 350 GTL
Ducati 350 GTL
Ducati 350 GTL
Ducati 350 GTL
Ducati 350 GTL

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