Tosh1218 Posted December 1, 2018 Report Share Posted December 1, 2018 I'm not mechanically minded so hope this isn't a daft question to some of you . On today's modern. GM engines there is a colured tab Black,green ,red etc what does this signify if anything ? Thanks in advance Quote Link to comment Share on other sites More sharing options...
*JJ Posted December 1, 2018 Report Share Posted December 1, 2018 Nothing. It is just a plastic segment which covers the cam sprocket. Quote Link to comment Share on other sites More sharing options...
Tosh1218 Posted December 1, 2018 Author Report Share Posted December 1, 2018 Thanks Quote Link to comment Share on other sites More sharing options...
foamfence Posted December 1, 2018 Report Share Posted December 1, 2018 44 minutes ago, *JJ said: Nothing. It is just a plastic segment which covers the cam sprocket. It actually denotes what stage the servicing is at, some engine builders change different parts at different services and that is a way of keeping track. 1 Quote Link to comment Share on other sites More sharing options...
MrMungo Posted December 2, 2018 Report Share Posted December 2, 2018 20 hours ago, Tosh1218 said: I'm not mechanically minded so hope this isn't a daft question to some of you . On today's modern. GM engines there is a colured tab Black,green ,red etc what does this signify if anything ? Thanks in advance Usually just used by the rider to more easily identify between the different engines he owns. 1 Quote Link to comment Share on other sites More sharing options...
Oafski Posted December 2, 2018 Report Share Posted December 2, 2018 On 12/1/2018 at 10:14 AM, foamfence said: It actually denotes what stage the servicing is at, some engine builders change different parts at different services and that is a way of keeping track. Green- Just been serviced, Black- Needs an Oil Change, Red- About to blow up. 1 3 Quote Link to comment Share on other sites More sharing options...
IronScorpion Posted December 2, 2018 Report Share Posted December 2, 2018 I thought it denotes the type of engine tune it has had. Oil is changed every 2-3 heats or should be according to PJR tuning. Quote Link to comment Share on other sites More sharing options...
Bald Bloke Posted December 2, 2018 Report Share Posted December 2, 2018 (edited) On 12/2/2018 at 2:01 PM, Oafski said: Green- Just been serviced, Black- Needs an Oil Change, Red- About to blow up. Green = blew to bits I've never noticed mechanics changing the valve cover off and changing the colours every 3 -5 races after a change of oil Edited December 4, 2018 by Bald Bloke Quote Link to comment Share on other sites More sharing options...
*JJ Posted December 3, 2018 Report Share Posted December 3, 2018 19 hours ago, IronScorpion said: I thought it denotes the type of engine tune it has had. Oil is changed every 2-3 heats or should be according to PJR tuning. Ours (now sold) had a proprietary cover with 'Ashtec Eng.' on it. When it got too shabby, I bought a black plastic one to replace it when the engine was rebuilt (black mainly because I thought is looked more flash!). We changed the oil after every meeting, but this was in amateur/MDL level. Quote Link to comment Share on other sites More sharing options...
GWC Posted December 6, 2018 Report Share Posted December 6, 2018 On 12/2/2018 at 3:35 PM, IronScorpion said: I thought it denotes the type of engine tune it has had. Oil is changed every 2-3 heats or should be according to PJR tuning. If that’s the case then no wonder the cost of racing is out of control! Quote Link to comment Share on other sites More sharing options...
martinmauger Posted December 6, 2018 Report Share Posted December 6, 2018 (edited) Continuing with engines, could someone please explain what the term 'off-set engine or crank' means again please. I had a link to a website which listed many such interesting technical details but don't seem to be able to find it. Thanks in advance.... Edited December 7, 2018 by martinmauger spelling (sigh) Quote Link to comment Share on other sites More sharing options...
foamfence Posted December 6, 2018 Report Share Posted December 6, 2018 8 minutes ago, martinmauger said: Continuing with engines, could someone please explain what the term 'off-set engine or crank' means again pease. I had a link to a website which listed many such interesting technical details but don't seem to be able to find it. Thanks in advance.... https://www.rideapart.com/articles/256853/free-power-offset-cylinders-explained/ 2 Quote Link to comment Share on other sites More sharing options...
martinmauger Posted December 7, 2018 Report Share Posted December 7, 2018 That's it, thanks.... Quote Link to comment Share on other sites More sharing options...
piston197 Posted December 7, 2018 Report Share Posted December 7, 2018 There is not a lot new in the world, this was being done many years ago particularly in scooters, but rather than having offset cranks, they were doing it simpler by having the gugeon pin off centre ( de-saxe) to minimise the side thrust of the piston, just had to be careful that you fitted the piston in the correct way round Quote Link to comment Share on other sites More sharing options...
martinmauger Posted December 7, 2018 Report Share Posted December 7, 2018 (edited) 6 hours ago, piston197 said: There is not a lot new in the world, this was being done many years ago particularly in scooters, but rather than having offset cranks, they were doing it simpler by having the gugeon pin off centre ( de-saxe) to minimise the side thrust of the piston, just had to be careful that you fitted the piston in the correct way round Never down that but managed to fit a throttle slide the wrong way round once, though it wasn't on a speedway bike. One never fogets the terror of a throttle stuck wide open . Then one gives much praise and thanks for the invention and fitting of the kill switch .... Edited December 7, 2018 by martinmauger added horror Quote Link to comment Share on other sites More sharing options...
Lord Skid Posted December 8, 2018 Report Share Posted December 8, 2018 I thought the coloured insert was the size of the engine, green 500, black 580, red 600+ 1 2 Quote Link to comment Share on other sites More sharing options...
adonis Posted December 10, 2018 Report Share Posted December 10, 2018 On 12/6/2018 at 11:22 AM, GWC said: If that’s the case then no wonder the cost of racing is out of control! warm up and 4 heats = 850 ml of new oil . about £10 . rebuild every 30 races ,£400 Quote Link to comment Share on other sites More sharing options...
Bald Bloke Posted December 10, 2018 Report Share Posted December 10, 2018 (edited) 2 hours ago, adonis said: warm up and 4 heats = 850 ml of new oil . about £10 . rebuild every 30 races ,£400 I guess your looking at about £30 per race when you add fuel,oil, service cost and a rear tyre. I don't know how long things like both chains and clutch plates last either. Edited December 10, 2018 by Bald Bloke Quote Link to comment Share on other sites More sharing options...
adonis Posted December 10, 2018 Report Share Posted December 10, 2018 22 minutes ago, Bald Bloke said: I guess your looking at about £30 per race when you add fuel,oil, service cost and a rear tyre. I don't know how long things like both chains and clutch plates last either. some elite league riders bin the clutch plates after every meeting , others keep them for 4 or 5 , 8 plates at £40 each , front chains last for about 10 meetings unless you want to risk your neck and have one break then you can push them further , About £40 for a primary chain . back ones last about the same and cost the same , if you want to maintain reliable kit speedway is a money pit with no bottom , dont forget the chainsprays and filter sprays , clutch bodies at £500 dont last a full season either Quote Link to comment Share on other sites More sharing options...
Bald Bloke Posted December 10, 2018 Report Share Posted December 10, 2018 (edited) On 12/10/2018 at 1:12 PM, adonis said: some elite league riders bin the clutch plates after every meeting , others keep them for 4 or 5 , 8 plates at £40 each , front chains last for about 10 meetings unless you want to risk your neck and have one break then you can push them further , About £40 for a primary chain . back ones last about the same and cost the same , if you want to maintain reliable kit speedway is a money pit with no bottom , dont forget the chainsprays and filter sprays , clutch bodies at £500 dont last a full season either Thanks for that Edit.. I had a look at Andy Smith's shop.Prices ain't bad really. NEB clutch plates are £9.50 each, NEB Elite clutch drums are £145. Interesting to look at http://www.frp-uk.com Edited December 11, 2018 by Bald Bloke Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.