Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 21, 2016 22:17:08 GMT -5
Well, I put in the 32 mm supposed performance carb today I got from Ebay . Lost some acceleration and gained ZIP / nodda on the top end which is what I was looking for. It has a main jet the size between a #56 and 57 drill bit. I know because I checked. The Chinese seller said it is a 125 main jet (no markings). I think I will at least have to back off to a 115 Main jet I have learned from another 32 mm carb advertisement . I would bet money I'm running rich. Just for now no air filter, Still stock muffler. Havn't checked the plug yet. Got dark on me. BTW I bet this 32mm carb is no more than a measured 1 mm bigger than the Japanese made stock carb. Definitely do not buy one of these. Just mod your own. Save $100 Again, Mod your stock carb and save your $100 IMO. Any suggestions Read more: thescooterprofessor.proboards.com/thread/4573/linhai-257-32mm-performance-carb#ixzz4I1jocbiV |
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 21, 2016 1:06:59 GMT -5
New fuel pump would starve out the motor at about sustained 60 mph running. I can't understand why because when I pulled the hose off the carb so I could turn the motor over and see how much fuel it pumps with each engine vacuum pulse it pumped plenty to run a 250. , It looked like enough to run a car ! So anyway I put another new fuel pump I have on the scooter, Adjusted the exhaust valve while I was right in the area of the belly. Started her up with no issues. In a tuck it will get my 260 lbs butt up to about 71. But still couldn't go any faster than 64-68 one up top speed. I may put that 32mm carb I got in the mail today on tomorrow. I hope it's won't become a nightmare to make run right. Read more: scooterrebels.proboards.com/thread/2676/miles-hour-257-linhai-jcl#ixzz4Hw8ffDzv |
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 21, 2016 0:51:39 GMT -5
One danger with the sliders is that on some bikes the belt may ride far enough past the rim of the variator to pull any oil sump gaskets it comes close to out. Not sure about the Yamaha design however on a number of dry sump engines this has been an issue. Simply trimming any excess gasket material sticking out into the belt path off with a razor will many times be all thats required to prevent this. I will check my CVT housing once I open her up for any oil sump gaskets. I was slowed down by a defective fuel pump replacement. New fuel pump would starve out the motor at about sustained 60 mph running. I can't understand why because when I pulled the hose off the carb so I could turn the motor over and see how much fuel it pumps with each engine vacuum pulse it pumped plenty to run a 250. , It looked like enough to run a car ! So anyway I put another new fuel pump I have on the scooter, Adjusted the exhaust valve while I was right in the area of the belly. Started her up with no issues. In a tuck it will get my 260 lbs butt up to about 71. But still couldn't go any faster than 64-68 one up top speed. I may put that 32mm carb I got in the mail today on tomorrow. I hope it's won't become a nightmare to make run right. Read more: scooterrebels.proboards.com/thread/2676/miles-hour-257-linhai-jcl#ixzz4Hw8ffDzv |
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 18, 2016 0:53:35 GMT -5
Having fuel pump problems and turning the starter a lot. Battery is a real trooper. Seems to turn and turn and turn the motor when having problems and while fixing scooter. Very pleased so far with this Bike master MG9-BS $64 to door. Not cheap, But not a rip off either.
|
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 18, 2016 0:35:29 GMT -5
Had a fuel pump go out on my scooter last week . So far it looks like it fixed the problem (Fuel pump). Then put my scooter up on the center stand and took it up to the rev limiter a couple times to find out where it topped out. The RPM went up to about 8400 without breaking up at all. Any higher and the RPM was unstable. But it would go up to about 8700 as indicated on the not so precise scooter tach. What that means is I might get my 5 mph on top if my variator isn't maxing out already. And 16.7 HP will haul my 260 lbs any faster than it already will go. While I've got the belly and side exposed I am gonna do a much needed valve adjustment. " Again " About the 4 th one I've done. "THEN" next on the agenda will be that Marking the inside of the variator test we talked about
|
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 18, 2016 0:26:07 GMT -5
Yea rock, I have ran into this problem before on other motorized projects. If new carb doe's not have a vacuum port for the vac fuel pump I will drill a hole in the intake and use goop sealant / adhesive to glue a brass tit in the hole to hook a hose to it to run the fuel pump. Works perfectly. Worthy concern though. And good roller / slider advice oldchopperguy.
|
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 17, 2016 1:23:27 GMT -5
Oldchopperguy, (Leo) I think you are right and think if I have any HP to spare which I might because my rpm at top speed is 400-500 past peak HP output per engine specs. This may indicate that sliders will net me some top end gains . I also feel the exact same way about my roller/ slider situation . If I have 14 gram rollers stock, Which btw I don't really know yet. I believe I should at least equal it in sliders. If not go up a gram. But I know how to add weight to sliders now so I should air on the side of caution and go no more than equal weight on the sliders or a gram less even as advised. The super HEAT /Humidity here on the gulf here in north central FL. right now has me grounded , I just won't get out there right now and dig into it . But it is kind of eating me up not knowing what my stock rollers weigh. And a few have said already that the big carby I bought will probably just haunt me with more problems than help. I'm on two lane highways out here. Just have to stay ahead of the belligerent YaHoos in pickups. No super slabs for me on a scooter. BTW I hope you get to feeling better. And glad I am getting good feed back and welcome more of it. Thanks again. John
|
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 15, 2016 0:55:31 GMT -5
Yes it is Tortiose. Sorry it took me so long to get back here. Again I lost my way because its not obvious . I have to hunt for the thread in unconventional ways. BTW One of the Aprilia's have a YP majesty motor I thought. Maybe its been awhile since they did. That is mighty fast for a 250 anything much less for a scooter for that matter though
|
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 11, 2016 11:31:06 GMT -5
How come I can't find this thread in the mainstream 250 and up section of this forum ? I always have to go to my user name and access my user names participation to get here.
|
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 11, 2016 11:28:15 GMT -5
WOW ! 100 verified MPH out of a 250 , Who the heck needs a big heavy 400cc + scoot at that rate !
|
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 10, 2016 15:28:30 GMT -5
Well, Finally got one of the Gel battery's sent to me. Seller sent a replacement for the one that was lost. I think I got the battery he originally sent me today. Told Ebay seller if I get a second one I would send it back to him. Nice strong starting power it has. At least while its new.  . |
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 9, 2016 13:34:53 GMT -5
The sliders and the correct windshield are usually all it takes. Most use a barn door windshield thats way too high and not very aerodynamic so top speed suffers. I now get much better top end performance on my bike once I put a Puig Sport Fairing on the bike instead of a Windshield. Interstate travel is in the middle or far left lane now with little issue keeping up with the flow or traffic. Mind you I am riding an Aprilia Sport City powered by a Piaggio 250cc engine and am riding on a 130/  -15 Metric Cruiser rear tire and 120/70-15 up front. I probably have the same if not close final ratio as you. Even though I have 13 inch tires. The factory fixes all that stuff when they design the scooter for it's intended purposes You are Probably getting your big edge from having a 4 valve engine instead of a two valve engine like my old school Yamaha 250 Majesty clone Linhia. You are definitely right though on the aerodynamics tip though. I'm long waisted and almost 6'4. So I am well up in the wind stream above my stock shield unless I'm in a tuck. |
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 9, 2016 13:18:55 GMT -5
quote author=" tortoise" source="/post/117072/thread" timestamp="1470382814"] . . . which should be compatible with more displacement. [/quote] Yes, But if my motors max potential has been reached already. I can't find anybody who has worked with the 257cc Linhia to see if we are already getting all it has to offer and still be reliable. Anybody can just go buy a bigger scooter. I'd like to know if what I have already has what I need first. It's so close to what I want and need already. |
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 8, 2016 23:15:18 GMT -5
I could be as simple as getting a taller tire Read more: itistheride.boards.net/thread/9619/mph-more-great-257cc-linhai#ixzz4GnzU25KCGot so much tire jammed in there right now it rubbed a little when I first put it on. On another subject, JR. from defunked Scoot dawg Forum put 12 gram DR. Pulley sliders on a 250A back in 2011. I'm assuming its a JCL MP250A which is exactly what I have. It was His wife's he said in the post. He said it ran great and went 75 mph. after 12 gram slider install "BUT" He never stated rider weight and height ,wind either. Mine would go at least 70 + with a short (all behind the windshield) 140 lbs. or less rider. it may even do his 75 mph. Anybody know if hes still around anywhere on these forums so I could inquire about such matters ? |
|
Sophomore Rider
Currently Offline
Posts: 183
Likes: 4
Joined: Mar 4, 2013 19:49:04 GMT -5
|
Post by 4950cycle on Aug 8, 2016 22:25:02 GMT -5
Well, My battery got lost / stolen once it left the mail facility in Columbus Ohio. Batt. was supposed to be here 7/29 . Finally got the Ebay seller to respond to the problem. He said He will send another Gel Batt. right out. We'll see how this goes ? It is now 8 /8 and I am still not riding. Guess the Ebay Bike Master deal wasn't so great after all.
|
|
-15 Metric Cruiser rear tire and 120/70-15 up front.