Triumph motorcycle camshaft timing
Please conduct your own research and verify that the information is correct before utilizing any of the information in this post. Triumph rockers generally as far as I know have around a This means that the valve lift does not equal the lobe height - lift at the valve will be higher than the lift at the lifter. Cam timing is sometimes quoted at 0. These numbers are from various shop manuals Triumph, Haynes, Clymer, etcwhich most likely originally come from the Triumph manuals.
I think the lift numbers quoted are measured at the tappet IE the cam lobe heightbut it's not explicitly stated. The E cam wasn't always a specific cam, it was a cam profile that was used on many cams for many years. There may have been a cam with the part number E, but there were many other cams that used the E profile. To make things more confusing, there were two E cams - Tricor and Factory. The E may have been the hot thing many years ago, but it's no longer considered a high performance profile.
These are not cam numbers, they are the part number for a blank that a cam profile is ground onto. A single blank will often be used for a number of different cam grinds, so this number doesn't actually tell you what cam you have.
The forging number should have raised numbers, the cam grind number should be stamped in. Either number is sometimes omitted. Created with Sketch. Gift Certificate Login or Sign Up 0. Shop By Category!!! Hats Shirts.
Modern computer designed ramps for best peak power with long durability. Great road-race cam. Featuring redesigned ramps for less lifter noise. Broad power band ideal for hot street. Triumph Cams. Great high performance, English-made intake camshaft. More information below: SKU : N. Great high performance, English-made exhaust camshaft. Great street performance cam!
Hi, does anyone know which timming marks, dots and dashes, to use when refitting the cam pinnions.Triumph 650 Motorcycle Engine Disassembly & Rebuild Part 9 - Lowbrow Customs
What did they use when they left the factory. Its a tv. Someone out there on the webs must know please. Qship Smile, you're on camera. Riding for 39 Years. Can't help, but hopefully someone will be along soon. ChrisAnglophile Riding for 52 Years. Al said:. Thanks for the reply. The thing is, its not that simple. The cam pinnions have dots and dashes on both inlet and ex. So do i match the dot or the dash up on the pinions to the intermeder counter wheel.
I havnt found anyone that can give me an answer. They must have left the factory set up somewhow. Hi Chris, here is a photo, ive put a marker pen by the side of the scribed marks.If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.
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Best All-Around Camshaft Set-Up For Triumph 650's
Does anybody know of video or article that walks you through step by step on retarding or advancing cam timing on a bonneville? Tools required? Thanks guys! Pete60 here is very experienced in cam timing, he would be a good one to ask. That's about all I can help you with. Last edited by Torch; at AM. Share This. Contact Us Chop Cult - bobber, chopper, choppers, harley, harley davidson, harley davidson motorcycles, harley motorcycles, harley sportster, kawasaki motorcycles, motorcycle accessories, motorcycle helmets, motorcycle parts, motorcycles for sale, suzuki motorcycles, triumph, triumph motorcycles, yamaha motorcycles, Archive.
Thruxton R Cams
All rights reserved.Camshafts especially for vintage Triumph's are confusing as there are so many variations and brands to choose from. My inlet camshaft was the E variety while my exhaust was the variety. This set up was stock from the factory which provided much power and reliability for typically on and off-road use applications. Since my exhaust camshaft was not being reproduced under the part number I had to search elsewhere until I ran across a cam called the E or "half race camshaft".
This camshaft was a stock profile cam exactly like my original exhaust camshaft that was no longer available. For the unaware the E camshaft profile is known as Triumph's most popular and "famous" grind that was designed. Harris make exclent vintage Triumph parts - I have had nothing but excellent results using L. Harris camshafts; the power and mid-range is exactly what I was looking for. Below is a comprehensive chart that will cover everything that you need to know about the best all around camshaft set-up for Triumph twins.
You will also find the lifters that should be used in conjunction with the E and E cams. All L. As far as timing goes, I went ahead and used a dial indicator and took measurements off the lifters using the figures.
I am almost certain you can run these camshafts using the stock timing marks and be fine. I went away from using the stock timing marks and made my own just to be safe and accurate. You can use this camshaft set-up on all Triumph twins from with great results. I would imagine that you could also use this same set-up on Triumph twins. If you are in the market like we where for cams I would recommend that you give this set-up a shot. For road use and even for other applications where you want your Triumph to have power but also be reliable and tameable then this may be what you want.
I have compiled a complete list below in which you can use to obtain the same set-up that we discussed in this post. Click on the parts in the list to be taken directly to the listing. E Inlet Camshaft. E Exhaust Camshaft. ER R Inlet Lifter.Necessary cookies are absolutely essential for the website to function properly.
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These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience. Necessary Always Enabled. Non-necessary Non-necessary.To let it out we have exhaust valves.
However, if these valves don't open and close at the right time the engine will not run. Worse still, if the valves open at the wrong time they can be hit by the piston and bent.
Valve Cam timing can be quite complex or quite simple. The exact time the intake valves and exhaust valves open and close will effect the amount of power produced by the engine and at what RPM it is produced. All this opening and closing is set at the factory and is all quite complex.
We don't really need to concern ourselves with the initial set up unless we have modified the engine and changed the cam to a high performance one. Then we would want to degree in the cam s with a Degree Wheel bolted to the crankshaft. We are not concerned with that here. What we want is to reproduce the original factory setting. This is quite simple IF we play by the rules. Assembly actually starts with disassembly. What do I mean?
Do the marks on the cam or cam sprocket match up with what the manual says? If they DON'T, I write down the marks that are used and how they are used so that on reassembly I can reproduce the correct cam valve timing.
On twin cam engines I count the number of cam chain rollers from the exhaust cam mark to the intake cam mark and write that down too. I do this on every four stroke engine I disassemble. On the last engine I rebuilt I forgot to do it, trusting in the factory shop manual I had.
Then I discovered it had some weird, aftermarket, simi adjustable, cam sprockets. Now what? Who knows who made these cam sprockets and what marks they used. I try what seem to be the factory marks but the cam lobes just don't look positioned right. I try some other marks and that looks better. I put it together Runs great. You can even make your own set of marks. I have found that even the factory manuals can be wrong.
Factory manual cam marks were degrees off To make your own marks BEFORE you take it apart just set turn the crankshaft so the 1 cylinder is at TDC Top-Dead-Center on the compression stroke Both intake and exhaust valves closed and then make some marks on the camshaft sprocket s and a corresponding mark on the cylinder head.
Use white paint. I suppose you could use a small punch mark, but I like paint better. If it's a twin cam engine count the number of rollers between marks you put on the camshaft intake and exhaust sprockets. Write it all down or take a digital picture of it.
You probably will never have to do this, but you can if it's necessary.