Replacement engine options - Page 2 - Triumph Forum: Triumph Rat Motorcycle Forums
T3 Sport / Touring Forum For the discerning Hinckley Sporting Enthusiasts. Open to all lovers of the original T3 Sport Models including the Trident, Sprint, Sprint Exec, Daytona, Trophy, and Speed Triple.

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post #11 of 21 (permalink) Old 04-20-2019, 04:29 PM
Formula Extreme
Main Motorcycle: 1996 900 Trophy BRG
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Other Motorcycle: 1998 Sprint Sport
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Green Cams are the stock factory cams for Trophys. Red Cams are the stock factory cams for the Daytona Super III. Someone else will have to tell you if the red cams were in the 900 Daytonas, because I don't have experience with them. The factory put a dab of paint on the #1 end of the cam. Green, Red, I think the Thunderbirds a Tiger got a different color Blue?, Brown?
As with most engine parts they are placed in an engine where they think the rider will want the power band to be. Daytona being the higher end of the rpm scale, Trophy in the middle, and Thunderbirds and Tigers down lower. For going slow around town Daytonas and Trophys aren't happy, they are freeway flyers. Maybe someone else can chime in on how slow traffic friendly the Tigers and Thunderbirds are.
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post #12 of 21 (permalink) Old 04-20-2019, 04:35 PM
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Slade 13 private email me on Green cam availability. Your private email is turned off.
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post #13 of 21 (permalink) Old 04-21-2019, 08:39 PM Thread Starter
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Main Motorcycle: 2007 speedmaster
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I think that #3 connecting rod is broken. I removed the plugs, cam cover and right crank case cover. It only rotates a few degrees. #1 moves, couldn’t see #2 due to the frame and #3 piston doesn’t move. Next step is “off with its head”!

air box and secondary air system removed, short tors, Avon tires
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post #14 of 21 (permalink) Old 04-23-2019, 11:52 AM
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I bought a broken engine Trophy 3 years ago. The piston and and rod on #2 were in a hundred pieces. What a mess. The rod was flopping around long enough to break part of the upper engine case. Ebay is my friend. I bought the parts needed to bring the engine back to life. Piston and liner, engine case, I don't remember if I changed out the crank. I bought all new crank and rod bearings. My brother is now enjoying that bike.
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post #15 of 21 (permalink) Old 04-23-2019, 06:17 PM Thread Starter
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So what do you think happened that to it? Lack of oil in the cylinder or something on the carb side.

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post #16 of 21 (permalink) Old 04-23-2019, 10:11 PM
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I'm open to educated guesses on that one. If it was a lack of oil, all the cylinders and pistons should have been effected. My guess is a big time air leak on #2. The air mixture it was so lean it burned a hole in the piston. But its hard to tell the piston was in 50 pieces or more. I found little pieces of ring material down in the engine sump. The rod was bent big time.
Years ago I was driving a Corvair van across the desert. The engine had 4 carbs. Turned out carb #1 was running lean and I burned a hole in piston #1. The hole was as big as a quarter. I limbed the Corvair back home and must have gone thru 7 quarts of oil while laying down a smoke screen. Highway Patrol wrote a citation. Getting it fixed and there would be no fine.
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post #17 of 21 (permalink) Old 07-03-2019, 05:54 PM Thread Starter
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Do all of the models with the triple engine have the same carb bodies?The jets will probably be different. If do replace my engine then I’d go with a 6 speed version.

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post #18 of 21 (permalink) Old 07-03-2019, 11:34 PM
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The earlier triples came with Mikuni carbs. Later ones came with Keihin carbs. I think they're are alot more out there with Mikunis. With respect to the cams, all the classic models had the brown cams. All sport touring models (Trident, Sprint Trophy Daytona) came with the green cams. The red cams were only on the Super III. I've owned an Adventurer and currently have a Sprint Sport. IMO, the green cams are by far the best cams for the street.

Dave
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'96 Adventurer
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post #19 of 21 (permalink) Old 07-03-2019, 11:45 PM
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In terms of the horsepower differences, from the classic models to the sport touring models it is only cams and exhaust. That's it. The sport touring models also have 2 discs up front. Rumor has it that the Super III had additional head work, but I've seen threads that say this isn't true.

Dave
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post #20 of 21 (permalink) Old 07-10-2019, 05:27 AM Thread Starter
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So I’ve decided to replace the engine. I got one out of a sprint. I’m going be starting my winter project a little bit early.

air box and secondary air system removed, short tors, Avon tires
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