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| Thread ID: 82079 | 2007-08-15 08:57:00 | Scooter Issues | roddy_boy (4115) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 581357 | 2007-08-18 01:59:00 | I think adding more oil to the mix would make the fuel denser and less fuel by volume would be going through the jet and result leaner mixture. I remember from the 70s those Kawakas 3 cylinder 2 stroke mach machines leaving a cloud of blue smoke. Graveyards in NZ are full of the riders from these machines when they open the tap too quickly the bike would flip right over. Killed by death what a horrible way to go They probaly wouldnt have been premix anyway a pump would have have given a ratio of less than 50 to 1 going by the smoke. The worst I have seen are British Seagull outboards would love to know ratio they use and engine oil to. In WW2 the smoke from these outboards caused the idiot poms to lose troops crossing the Irriwaddy river in Burma. The japs saw the smoke and open fire with machine guns. Dead poms everywhere. tedheath |
tedheath (537) | ||
| 581358 | 2007-08-18 02:31:00 | I had a Kawasaki 750H2 Triple . . . god awful power and very short wheelbase made it very unstable over 80mph/130kph . . . even if I cranked the steering dampener all the way down . Smoke? Not too bad with Castrol Caster-R-type . It smelled real good too . My Yamaha YDS2/250 was a little less smoky . . but that Kawasaki Troika made me really appreciate the fact that I could get in trouble real easy from it . Later went to the Kawasaki KZ-650/4, and found a great roadster without any bad habits at all . Ever get a tank-slapper going at 100mph/160kph? The seat gets wet . |
SurferJoe46 (51) | ||
| 581359 | 2007-08-18 02:38:00 | Mine's self mixing. Anyway to test it's putting in the right fuel:oil ratio? I still haven't gotten around to doing the spark plug - it's ball weekend this weekend so have been otherwise occupied. | roddy_boy (4115) | ||
| 581360 | 2007-08-18 05:59:00 | Ever get a tank-slapper going at 100mph/160kph? The seat gets wet . just the other night i got a nasty wobble on the motorway in gale force winds with horizontal rain . scary stuff at 130kph . really should have slowed to the 80kph all the cars were doing:lol: Adding more oil, although it may seem like a good idea actually leans out the fuel:air ration, making the engine run hotter and possibly burn up because there's too much oxygen in the combustion chamber trying to remove aluminum and metals from the internal parts . i was considering the cooling effect of the oil, but i suppose your're right about oxygen I've never had any problems short nor long term at 16:1, so i thought if my chinese crap worked on it perhaps his would . in either case it's no wonder the motorcross world is turning 4-stroke:thumbs: |
motorbyclist (188) | ||
| 581361 | 2007-08-20 03:17:00 | Hi guys, I've just changed the spark plug - minor improvement, but still won't go properly. Next step would to be to check the rings I guess? |
roddy_boy (4115) | ||
| 581362 | 2007-08-20 04:21:00 | Hi guys, I've just changed the spark plug - minor improvement, but still won't go properly . Next step would to be to check the rings I guess? The head on most 2-cycles are pretty simple . . no valves or rockers or cams or whatever . . . so actually pulling the head is pretty easy . Running a compression check on a ported cylinder is usually not a fair indicator of trouble . . . unless you have a baseline value to use for comparison before any damage may have been done . Was there any splashed metal on the old spark plug? If there was, then it's a given that you should pull the head . . and then the cylinder too . You won't be able to tell much by looking at the top of the piston about the condition of the rings . . . they'll be out of sight anyway . . . but . . and here's a big but here . . . if you find a crater or hole forming in the top of the piston, then that's when you rip the cylinder off and replace the piston and rings . . . provided the cylinder isn't scored . This may all be rather ahead of the fact though, and you might not have any problems along this line . . I wish I could be there to help and look things over . . . . <hint hint . . my offer of field repairs and a service call stills stands> Why don't you upload a few pixs of the head, cylinder, general engine shots front/rear/both sides . . . etc . . . and let's do this long distance if you like . Get the shots really close and look into the exhaust port for carbon build-up . . this is another power sucker . Be sure to take a few shots before any disassembly is done too . I fear that if you have scored the cylinder, then the best thing to do is replace the cylinder/piston/rings/wrist pin as an assembly from the manufacturer . . . but you have to pencil out the costs and such, as I have no idea of the original expense of the vehicle . . . and the sum of the parts may well exceed the value of the whole here . Parts availability may be another factor to consider . The only expense you are saving here is labor and my technical help . :rolleyes: . . but then again, there's the satisfaction of doing something yourself . . . if that floats your boat . |
SurferJoe46 (51) | ||
| 581363 | 2007-08-20 04:49:00 | The head on most 2-cycles are pretty simple . . no valves or rockers or cams or whatever . . . so actually pulling the head is pretty easy . Running a compression check on a ported cylinder is usually not a fair indicator of trouble . . . unless you have a baseline value to use for comparison before any damage may have been done . Was there any splashed metal on the old spark plug? The spark plug had a bit of carbon looking deposit on it, but other than that nothing too out of the ordinary . The gap distance had been stretched a bit though . You won't be able to tell much by looking at the top of the piston about the condition of the rings . . . they'll be out of sight anyway . . . but . . and here's a big but here . . . if you find a crater or hole forming in the top of the piston, then that's when you rip the cylinder off and replace the piston and rings . . . provided the cylinder isn't scored . This may all be rather ahead of the fact though, and you might not have any problems along this line . . I wish I could be there to help and look things over . . . . <hint hint . . my offer of field repairs and a service call stills stands> Yeah when I pull it apart I'll try check out the reed valves to make sure they're not blocked or hindered in any way . Why don't you upload a few pixs of the head, cylinder, general engine shots front/rear/both sides . . . etc . . . and let's do this long distance if you like . Get the shots really close and look into the exhaust port for carbon build-up . . this is another power sucker . Be sure to take a few shots before any disassembly is done too . I'll take some pics sometime in the next few days . I don't think I'll have any time to have another go at anything major until the uni holidays start next week . I fear that if you have scored the cylinder, then the best thing to do is replace the cylinder/piston/rings/wrist pin as an assembly from the manufacturer . . . but you have to pencil out the costs and such, as I have no idea of the original expense of the vehicle . . . and the sum of the parts may well exceed the value of the whole here . Parts availability may be another factor to consider . It definitely isn't worth very much, so if I find it's going to cost any sort of real money to fix I'll just give up on it more than likely . The only expense you are saving here is labor and my technical help . :rolleyes: . . but then again, there's the satisfaction of doing something yourself . . . if that floats your boat . Yeah that's one of the main reasons I'm doing all of this myself - and with the help of my flatmate . It's a great learning curve for me, and it's good fun pulling it apart too :p |
roddy_boy (4115) | ||
| 581364 | 2007-08-20 12:55:00 | can't you see the rings/piston via the exhaust port? | motorbyclist (188) | ||
| 581365 | 2007-08-20 14:27:00 | can't you see the rings/piston via the exhaust port? You can see a small portion of them...that part that passes by the port...but that's not much. |
SurferJoe46 (51) | ||
| 581366 | 2007-08-20 14:31:00 | well it's something :) | motorbyclist (188) | ||
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