evilone wrote:You need to remove the fan and stator to get to the seal. The oil pump side is the same side as the variator, stator is on the other side.
i checked the seal on the starter side. it's good. i can't figure out why my compression is so low so i scored another block for 30 bucks. hopefully i can have it together by middle of next week and see how she does.
have you done a ring end gap.. on the old girl????
swimmingfree
handicap (dyslexia) looking for
se50 crank...
SpreJunk 87elite in a spree body
ruckus variator , 3.5 tire , 1500 drive face spring , a 64 bbk ,
8 gram rollers, stock carb , after market air filter and 105 jet
Are there any scratches or score marks on this bore? Did you use a new head gasket when you installed it? There must be something your not seeing or is being overlooked to have such a huge compression lost or the gauge is now not working right. Did try another gauge? Or put a little oil in the spark plug hole then check compression to see if it comes up?
Nothing like getting stroked!
Thanks to my sponsors
Nos Energy Drinks,themopedcompany.com,nwautoevents.com,Cycle Gear
90 honda dio sp 72cc
87 elite 50 s with 86cc watercooled mini stroke
87 elite 50 race bike mhr 72cc
91 yamaha tzr 250r
bakaracer wrote:Are there any scratches or score marks on this bore? Did you use a new head gasket when you installed it? There must be something your not seeing or is being overlooked to have such a huge compression lost or the gauge is now not working right. Did try another gauge? Or put a little oil in the spark plug hole then check compression to see if it comes up?
I agree. there's some reason why it has that low of compression. The bore looks good. and yes i had a new head gasket on. i didn't put any oil on the plug hole. i forget about that trick.
if you put oil on the inside of the jug and piston when you put it together more oil wont help ..
swimmingfree
handicap (dyslexia) looking for
se50 crank...
SpreJunk 87elite in a spree body
ruckus variator , 3.5 tire , 1500 drive face spring , a 64 bbk ,
8 gram rollers, stock carb , after market air filter and 105 jet
You would need to split the cases if you are going to port the intake cause the shavings get everywhere and you dont want that stuff inside the crankcase when you run the motor cause it can score the piston and cylinder walls
1986 Spree/ Eve af16 swapped 65cc Prodigy vari 8g 9:1 Ruima gears
21mm OKO 42/100 32:1 45mph kymco zx exhaust
1994 Elite S 17.5mm Arreche, Daytona reeds, SEF ramp, pump plugged
1987 Elite SE50 af16 swapped
1989 Elite E SB50p
2003 Yamaha Zuma
Mystic wrote:You would need to split the cases if you are going to port the intake cause the shavings get everywhere and you dont want that stuff inside the crankcase when you run the motor cause it can score the piston and cylinder walls
yeah, that's why i was wondering if it would be worth it to do.
unless you have a crank tool it is difficult to get it pressed back together. It can be done but its not easy and you run the risk of damaging something
1986 Spree/ Eve af16 swapped 65cc Prodigy vari 8g 9:1 Ruima gears
21mm OKO 42/100 32:1 45mph kymco zx exhaust
1994 Elite S 17.5mm Arreche, Daytona reeds, SEF ramp, pump plugged
1987 Elite SE50 af16 swapped
1989 Elite E SB50p
2003 Yamaha Zuma
Mystic wrote:unless you have a crank tool it is difficult to get it pressed back together. It can be done but its not easy and you run the risk of damaging something
No crank tool here. looks like she's staying the way she is. thanks mystic.
personally I wouldnt let lack of tools stop me you just have to use your head and take it easy. I used a rubber mallet and pieces of wood to put my cases back together or you could call around to some engine shops and see how much they would cahrge to press them back together once you enlarge the intake
1986 Spree/ Eve af16 swapped 65cc Prodigy vari 8g 9:1 Ruima gears
21mm OKO 42/100 32:1 45mph kymco zx exhaust
1994 Elite S 17.5mm Arreche, Daytona reeds, SEF ramp, pump plugged
1987 Elite SE50 af16 swapped
1989 Elite E SB50p
2003 Yamaha Zuma
i use the bolts to do it the long ones off the jug first and take it slow and keep it square and even..
swimmingfree
handicap (dyslexia) looking for
se50 crank...
SpreJunk 87elite in a spree body
ruckus variator , 3.5 tire , 1500 drive face spring , a 64 bbk ,
8 gram rollers, stock carb , after market air filter and 105 jet