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Post by digitalinsite on Feb 19, 2011 22:26:42 GMT -5
hey guys,
im thinking of dropping the oil out of my hyosung sf50 2006 since doing a brand new 72cc BBK last week
The previous owner gave me a bottle of Valvoline 2 stroke racing oil but it doesnt have any oil rating on it whatsover.
what oil do you guys run and how have you found it for the engine etc?
Do you use mineral oil or fully synthenic ? What oil rating?
Also, what oil have you guys put in the transmission and how often have you changed it. I have no idea when mine was last changed but Im guessing it needs it.
thanks
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Post by Panaramaguy on Feb 19, 2011 23:37:01 GMT -5
I use Amsoil (synthetic oil) to the oil tank and add an additional 30ml to the gas tank at each fill up. After installing a 70cc kit the oil pump is still only putting out enough oil for a 50cc cylinder. The Hyosung oil pump isn't adjustable, so either you'll need a better oil or or more of it. I keep a clear graduated bicyle water bottle under the seat to hold the extra oil.
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Post by digitalinsite on Feb 20, 2011 3:34:32 GMT -5
sweet - thanks
good idea carrying some extra
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Post by tomcas on Feb 20, 2011 7:06:10 GMT -5
In my two stroke bikes I run Yamalube 2-S which is a semi- synthetic rated at Jaso-FC. It's not the best but it's a good value, has good lubrication properties, no smoke, and no smell. Basically anything with at least either Jaso-FC or ISO-GD ratings are OK. Here's a chart I made several years ago with ratings.  |
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Post by thiess87 on Feb 20, 2011 7:36:17 GMT -5
Hey guy do u have any experiance on this scrappy dog kit he's got if so what kinda manufactor is it? And what are the port timing on it? Ur 7 gram weights would give u a much higher top speeds the lower u go the more torque u have in its like a rope by it's sell spinning it round and round by ur side but if u pit a brick on it n spin it (ur 7gram weights) u will feel alot more force coming out of it which would make u go muchhigher speed. If I were u I would clean my carb check my fuel filter. N Honesly with what I did which worked for me lol o take a old flat head screw driver maybe 7 inch long tip n jus keep doin at the inside of the exhaust it won't make it louder jus more flowing or do Wat I did j take the exhaust of n cut it open n gut it out now I'm not sure where u live at I have a friend Dan that lives in Canada n he said when he got his Hyosung it didn't have the EPA bypass on it now does hrs have it on the header of the exhaust. If so u could cut that off n seal it so it's jus one hole piece not splitting in to 2 n u can also remove all the parts from that the black canister and the black piping under ur leg shield. I did some research last night n also in the header pipe it says in 2006 n newer do have a restrictors in the header now not knowing ur year I'm not sure what to tell u besides lol undo a metal hanger take of the exhaust completely n shove the hanger in it after u take off the three bolt pattern on he exhaust put it through the header n if it stops u have on if not Honesly if money is a issue to u I'd jus work on he stock exhaust I did with my cylinder kit for over 1600 km n I was doin good way over 80km so hope in any way that helped
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Post by thiess87 on Feb 20, 2011 7:38:58 GMT -5
And I use repsol oil $47 a gallon not bad I think
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Post by digitalinsite on Feb 20, 2011 19:01:24 GMT -5
hey sean,
im mark by the way - nice to meet ya.
yeah, my sf50 rally is a 2006. No secondary pipe coming off my exhaust. Guessing the previous owner cut it off. i pulled the exhaust off on the weekend and checked the flange restrictor and its gone. Damn stock exhaust is heavy as lead tho. I reckon the bike would go faster with a new exhaust on the reduced weight alone! yeah i jammed a long screw driver in the end and tried to hack it up but seems pretty welded up. Think i better nowt make it worse and just save for an aftermarket exhaust.
hey sean, do you remember what mainjet and roller weight you were using when you had the stock pipe and were getting it to about 80km/h? Was that with the 70BBK and was acceleration still good?
when i first got my scoot the guy had mega heavy weights in it (6 x 14 grams). It did 75km/h on the flat maybe a little more but was completely useless as far as acceleration. I halved the weights to 42 grams and stacks better accel now just not as good top speed. hoping that sliders will help this
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Post by buiditright on Feb 20, 2011 19:10:04 GMT -5
Mark,
Amsoil is good I run Motouls or how ever you spell it in mine. ALso I run an 80 main jet in mine and it is stock 50 but with a pipe and I run Dr Pulley sliders in mine.
Bill
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Post by digitalinsite on Feb 20, 2011 19:18:05 GMT -5
hey bill - so you're running 6gram sliders with your technigas pipe?
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Post by buiditright on Feb 20, 2011 19:25:35 GMT -5
I run 3-6gr and 3-4.5gr
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Post by jimh on Feb 20, 2011 20:27:16 GMT -5
Amsoil synthetic and 3-6gr and 3-4.5gr dr pulley sliders@31.5gr total weight equals out to about 5.25 each
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Post by buiditright on Feb 20, 2011 20:47:50 GMT -5
AND THEY WORK
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Post by thiess87 on Feb 20, 2011 20:48:40 GMT -5
lol well hello all lol what i day. whats up mark im sean nice to meet u  i was running a 87.5 main jet with 7x12 7.2 leo vince weights with the athena cylinder kit. yes i was well over 80km according to gps i was at 90km with stock exhaust also had clutch springs set to 2000rpms a yellow malossi torque spring drilled out clutch bell carbon fiber parts carbon fiber reeds removed alot of items off the scooter malossi airfilter a 65mm riser n a racing coil that is it n i was doin that speed. as soon as my piston comes in on tuesday i will make u a video of my scooter and what it can do with what it has done to it to show u what ever u have wrong with urs as soon as all of us on this board or thread help u get past it this thing is one hell of a scooter to have as much as a pain in the ass this morini 2 stroke motor is its so much fun |
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Post by digitalinsite on Feb 21, 2011 2:37:55 GMT -5
damn sean - sounds like youre as obsessive about modding your skoot as I was with my last one. I got my PGO gyspy to 97km/h and then the crankshaft snapped off on the magneto end. guys at the scoot shop reckon i must have been doing about 11,000 rpm or more to snap it. Hardened steel as thick as your thumb. Had to completely rebuild the scoot, split the crankcase and everything. Got it all back up and running in the end and told the guy that bought it to keep it under 85km/h
thanks guys - stacks of great advice here. nice to meet u all.
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Post by lshigham on Feb 21, 2011 13:09:37 GMT -5
I've taken the stock crank on my Runner to 13k, cruising at 12k. OK, the bottom end is about to go at 5k miles, but it's still good fun  |
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Post by lshigham on Feb 21, 2011 13:19:09 GMT -5
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Post by thiess87 on Feb 21, 2011 16:37:08 GMT -5
hell yea luke i jus started using that stuff its rly good i was use to using the repsol 2 stroke oil but this i think is alot better
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Post by jjjoseph on Mar 21, 2011 22:19:57 GMT -5
hey guys, im thinking of dropping the oil out of my hyosung sf50 2006 since doing a brand new 72cc BBK last week I don't recommend bypassing the oil pump, even with a BBK. The oil pump still pumps enough to feed a 90cc BBK, and you don't really need to add oil to the gas. The nice thing about the oil pump is that it feeds constantly, even on long downhills so your engine doesn't get starved for oil like with old 2-strokes. Also, on some scoots, the oil pump feeds oil into the throttle slide to keep it working smoothly. On old 2-strokes you had to oil the throttle slide by hand which is a real pain. 2-stroke oil pumps are one of the best inventions! |
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Post by jessegar on Mar 23, 2011 5:27:43 GMT -5
hey guys, im thinking of dropping the oil out of my hyosung sf50 2006 since doing a brand new 72cc BBK last week I don't recommend bypassing the oil pump, even with a BBK. The oil pump still pumps enough to feed a 90cc BBK, and you don't really need to add oil to the gas. The nice thing about the oil pump is that it feeds constantly, even on long downhills so your engine doesn't get starved for oil like with old 2-strokes. Also, on some scoots, the oil pump feeds oil into the throttle slide to keep it working smoothly. On old 2-strokes you had to oil the throttle slide by hand which is a real pain. 2-stroke oil pumps are one of the best inventions! Na man! If you are going BBK you really should just Ditch the oil injection, and Premix! With that pump it just gives you one more thing to fail. and you really have know why of knowing how much it is mixing. As for oiling your throttle slide, i don't see why this would make a difference. if you premix the oil is getting everywhere in your carb. oil pumps are great on mostly stock bikes, but you will never see anyone racing a scooter with the oil injection still on it. My 2 cents. |
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Post by jimh on Mar 23, 2011 17:02:18 GMT -5
Most of us don't race scooters, we ride them for pleasure and as an alternative means of transport. Some like to premix, others like their oil pumps. I have yet to hear of an oil pump on a hyosung/UM 50 taking a dump. Personally, I like the convenience of an oil pump over premixing. Morini engines and components are very well made; it it aint broke, don't fix it!
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i was running a 87.5 main jet with 7x12 7.2 leo vince weights with the athena cylinder kit. yes i was well over 80km according to gps i was at 90km with stock exhaust also had clutch springs set to 2000rpms a yellow malossi torque spring drilled out clutch bell carbon fiber parts carbon fiber reeds removed alot of items off the scooter malossi airfilter a 65mm riser n a racing coil that is it n i was doin that speed. as soon as my piston comes in on tuesday i will make u a video of my scooter and what it can do with what it has done to it to show u what ever u have wrong with urs as soon as all of us on this board or thread help u get past it this thing is one hell of a scooter to have as much as a pain in the ass this morini 2 stroke motor is its so much fun
