Tiger80 Posted May 13, 2020 Share Posted May 13, 2020 (edited) Hi could you please help me with a query about triumph crankshafts. I know that my bike is a civilian bike a Triumph T80 but it is very similar to the bikes you guys have. My query is does anybody know if cranks from other bikes of this period are interchangeable as I am struggling to find crankshaft say for my Tiger with the correct part numbers. When I have looked at the technical information in the book by A.St.J . Masters most of the bikes have the same measurements e.g.Stroke. To cut a long story short will a crank from say a Triumph 3HW fit my Tiger Thanks Mark Edited May 13, 2020 by Tiger80 Quote Link to comment Share on other sites More sharing options...
Ron Posted May 13, 2020 Share Posted May 13, 2020 I'm pretty sure they are the same but I'll check pre-war parts list tomorrow. But what is wrong with your original that can't be fixed? Ron Quote Link to comment Share on other sites More sharing options...
Tiger80 Posted May 13, 2020 Author Share Posted May 13, 2020 Hi not sure if you remember a while back I put a post on with a photo of some quite bad wear to the flywheel caused by the conrod wearing the cast iron away. This means there is slot of sideways movement of the conrod. I think you gave me some advice at the time about maybe getting them welded up. I've since spoke to a coded welded who advised this might cause me more problems. I think you also gave me another good option of maybe thrust washers but before going down that route I was wondering if it might be easyer to get a crank from another model. The parts lists I have all models have different numbers for the flywheel s but as far as I can see the technical information for the different models Stroke, main bearing diameter ect are identical. So am wondering if there is any main difference apart from part numbers. Quote Link to comment Share on other sites More sharing options...
Ron Posted May 14, 2020 Share Posted May 14, 2020 I just checked my 39 parts list and you are right, they have different part numbers for the 350 flywheels 3S & 3SE are the same but they all share the same main shafts. The WD 3SW and 3HW use the same flywheels as the 3S and 3SE. I can only think that there might be different weights to the flywheels to do with performance. Brian Tillin (Swanage) is the Triumph singles guy. I'd speak to him about the problem. PM me if you want his contact details. Ron Quote Link to comment Share on other sites More sharing options...
Tiger80 Posted May 18, 2020 Author Share Posted May 18, 2020 On 5/14/2020 at 5:40 AM, Ron said: I just checked my 39 parts list and you are right, they have different part numbers for the 350 flywheels 3S & 3SE are the same but they all share the same main shafts. The WD 3SW and 3HW use the same flywheels as the 3S and 3SE. I can only think that there might be different weights to the flywheels to do with performance. Brian Tillin (Swanage) is the Triumph singles guy. I'd speak to him about the problem. PM me if you want his contact details. Ron Hi Ron I spoke to Brian Gilpin today. He says he is going to have a look if he has any spare but if all else fails a crank or flywheel s from a 3he will fit so ask you guys if you have one you might sell if he can't find any.Thanks Mark Quote Link to comment Share on other sites More sharing options...
Tiger80 Posted May 18, 2020 Author Share Posted May 18, 2020 Just now, Tiger80 said: Hi Ron I spoke to Brian Gilpin today. He says he is going to have a look if he has any spare but if all else fails a crank or flywheel s from a 3he will fit so ask you guys if you have one you might sell if he can't find any.Thanks Mark Sorry my predictive text is going mad. I mean Brian Tillin and 3hw crank Quote Link to comment Share on other sites More sharing options...
Tiger80 Posted May 19, 2020 Author Share Posted May 19, 2020 Hi I spoke to Brian tillin and asked about compatibility of cranks to my Tiger 80. He is trying to find some spare flywheel s but said 3hw one's will fit so am asking if anyone has a 3hw crank or flywheels for sale if he can't find tiger ones. Quote Link to comment Share on other sites More sharing options...
Ron Posted May 19, 2020 Share Posted May 19, 2020 There's a pair on ebay but in Australia and the post will kill it. There must be others out there if you shout loud enough. I'll ask around. Ron Quote Link to comment Share on other sites More sharing options...
Ron Posted May 19, 2020 Share Posted May 19, 2020 OK I've found some flywheels and PM'd you. I also found out that the T80 had steel flywheels and the 3HW had cast iron.....So nothing much in it. Ron Quote Link to comment Share on other sites More sharing options...
Ron Posted May 23, 2020 Share Posted May 23, 2020 I've sent you a PM and follow up email but had nothing back so far?? Ron Quote Link to comment Share on other sites More sharing options...
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