Dave’s Building a 10-Footer: A 1970 Triumph TR6R Build – Part 2

The 1970 Triumph TR6R Build Continues: Rotor and Stator

Next in the series shows me checking the air gap of .009” between the rotor and stator, in various positions. I rotate the engine while moving the feeler gauge around the circle, ensuring there is no tight spots. The rotor was in good condition, no “runout” on the end of the crankshaft, and the stator studs are not bent, so this procedure passed with flying colors.

Primary Chain

𝙄 𝙝𝙖𝙫𝙚 𝙖𝙙𝙟𝙪𝙨𝙩𝙚𝙙 𝙩𝙝𝙚 𝙥𝙧𝙞𝙢𝙖𝙧𝙮 𝙘𝙝𝙖𝙞𝙣 𝙩𝙤 3/8” 𝙤𝙛 𝙛𝙧𝙚𝙚 𝙢𝙤𝙫𝙚𝙢𝙚𝙣𝙩. 𝙄 𝙧𝙚𝙘𝙤𝙢𝙢𝙚𝙣𝙙 𝙚𝙧𝙧𝙤𝙧𝙞𝙣𝙜 𝙤𝙣 𝙩𝙝𝙚 𝙡𝙤𝙤𝙨𝙚 𝙨𝙞𝙙𝙚 𝙩𝙤 𝙝𝙚𝙡𝙥 𝙤𝙗𝙫𝙞𝙖𝙩𝙚 𝙤𝙫𝙚𝙧𝙡𝙤𝙖𝙙𝙞𝙣𝙜 𝙩𝙝𝙚 𝙝𝙞𝙜𝙝 𝙜𝙚𝙖𝙧 𝙗𝙚𝙖𝙧𝙞𝙣𝙜 𝙖𝙣𝙙 𝙩𝙝𝙚 𝙘𝙡𝙪𝙩𝙘𝙝 𝙧𝙤𝙡𝙡𝙚𝙧 𝙗𝙚𝙖𝙧𝙞𝙣𝙜𝙨. 𝙁𝙞𝙣𝙖𝙡𝙡𝙮, 𝙩𝙝𝙚 𝙖𝙨𝙨𝙚𝙢𝙗𝙡𝙚𝙙 𝙥𝙧𝙞𝙢𝙖𝙧𝙮 𝙙𝙧𝙞𝙫𝙚 𝙞𝙨 𝙥𝙞𝙘𝙩𝙪𝙧𝙚𝙙, 𝙬𝙞𝙩𝙝 𝙩𝙝𝙚 𝙩𝙖𝙗 𝙬𝙖𝙨𝙝𝙚𝙧 𝙤𝙣 𝙩𝙝𝙚 𝙧𝙤𝙩𝙤𝙧 𝙡𝙤𝙘𝙠𝙚𝙙 𝙤𝙫𝙚𝙧 𝙖 𝙛𝙡𝙖𝙩 𝙤𝙣 𝙩𝙝𝙚 𝙣𝙪𝙩, 𝙖𝙣𝙙 𝙩𝙝𝙚 𝙞𝙣𝙞𝙩𝙞𝙖𝙡 𝙖𝙙𝙟𝙪𝙨𝙩𝙢𝙚𝙣𝙩 𝙤𝙛 𝙩𝙝𝙚 𝙘𝙡𝙪𝙩𝙘𝙝 𝙨𝙥𝙧𝙞𝙣𝙜 𝙏-𝙣𝙪𝙩𝙨 𝙛𝙡𝙪𝙨𝙝 𝙬𝙞𝙩𝙝 𝙩𝙝𝙚 𝙗𝙤𝙩𝙩𝙤𝙢 𝙤𝙛 𝙩𝙝𝙚 𝙨𝙡𝙤𝙩𝙨. 𝙄 𝙬𝙞𝙡𝙡 𝙘𝙝𝙚𝙘𝙠 𝙖𝙣𝙙 𝙩𝙧𝙪𝙚 𝙩𝙝𝙚 𝙥𝙧𝙚𝙨𝙨𝙪𝙧𝙚 𝙥𝙡𝙖𝙩𝙚 𝙗𝙚𝙛𝙤𝙧𝙚 𝙛𝙞𝙩𝙩𝙞𝙣𝙜 𝙩𝙝𝙚 𝙥𝙧𝙞𝙢𝙖𝙧𝙮 𝙘𝙝𝙖𝙞𝙣 𝙘𝙖𝙨𝙚 𝙘𝙤𝙫𝙚𝙧, 𝙩𝙝𝙚 𝙛𝙞𝙣𝙖𝙡 𝙨𝙩𝙚𝙥 𝙞𝙣 𝙩𝙝𝙚 𝙘𝙡𝙪𝙩𝙘𝙝 𝙨𝙚𝙩 𝙪𝙥.”

Mark made a great comment on our social media post, “Seems from the 2nd photo that the chain tensioner is almost maxed by that high of an arch. I’d be replacing the chain.”

The good word from Dave? “I considered replacing the chain and tensioner but there’s still some service life in there. I bet it’s still got a couple thousand miles in it (especially the way I ride, ha!). But because of budget constraints and because it’s not a customer’s bike; if it was a customer’s bike, I would have recommended a replacement, I opted to keep the chain.”

timing cover and outer gearbox

The crankcase halves have been cleaned and inspected. The connected rods have also been cleaned, inspected, and lightly polished. The timing cover and outer gearbox cover have been sanded and polished to mimic the original sheen. Drive side view of the engine shows the high gear bearing seal and oil seal fitted. I like to install the gearbox bearings before joining the crankcase halves. The locking connecting rod tool allows me to torque down the crankshaft and camshaft pinion nuts. Once the transmission was installed, the inner gearbox cover is fitted. I prefer indexing the camplate in the high-gear position on a 4-speed Triumph 650 transmission, as shown in the picture.