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Post by 4950cycle on Aug 24, 2016 22:10:23 GMT -6
I went to put on my old carb on today to get ready to do the variator test. What a bitch working through that hole underneath the seat. Especially when I'm not using pod air filter (K&N style). When I finally get it in there and all hooked up I try to start it. Gas started coming out of the overflow tube as fast as the fuel pump would pump it. I guess all that wresting with the carb somehow got the float stuck inside the float bowl is all I could figure. Tomorrow's another day  Read more: scooterdoc.proboards.com/thread/13008/mph-more-top-speed-mp250a#ixzz4IJVfHYMq |
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Post by 4950cycle on Aug 23, 2016 22:51:33 GMT -6
Hey I'm havin fun out here all by myself !  |
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Post by 4950cycle on Aug 22, 2016 23:42:09 GMT -6
I feel I should cap this 32 mm carb fiasco off with this. Get this, After all this I put my 115 main out of my old Jap 30 mm carb in the new 32 mm , New carb ran great then ! But no better readings from the tach and speedo than my old carb. I think it had a sleight edge on my old carb in the mid range. But not enough difference to change much. So what that means is if they will take this 32 mm back I want a refund. And the old Jap 30 mm goes right back on with no more than one jet size higher or lower than stock. Hell, It might even run the best with this 115 main jet it came with.
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Junior
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Post by 4950cycle on Aug 22, 2016 23:34:24 GMT -6
As far as my sliders my Zodiac 14 grams round changed it to sliders improved speed quicker but doesn't seem any faster I hope this will answer your question. Do I feel money worth spent yes and no. Quicker speed to keep up with my friends Harley but then two he shifts which may be the reason. Thanks for the info. I think I might get 13 gram sliders. This way they won't be to heavy for good acceleration , But will be heavy enough to bring my variator to full diameter at top speed. If it was rollers I would probably need to go a little heavier since they bring the variator out to full diameter with less efficiency I've been told. |
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Junior
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Post by 4950cycle on Aug 22, 2016 23:00:12 GMT -6
Get this, After all this I put my 115 main out of my old Jap 30 mm carb in the new 32 mm , New carb ran great then ! But no better readings from the tach and speedo than my old carb. I think it had a sleight edge on my old carb in the mid range. But not enough difference to change much. So what that means is if they will take this 32 mm back I want a refund.
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Junior
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Post by 4950cycle on Aug 22, 2016 10:23:44 GMT -6
I go with the hair dryer as Alley says.
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Junior
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Post by 4950cycle on Aug 22, 2016 10:18:19 GMT -6
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Junior
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Post by 4950cycle on Aug 22, 2016 10:16:29 GMT -6
Sorry , Put this in the wrong place. I will copy and paste and put it in the Chinese section.
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Junior
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Post by 4950cycle on Aug 22, 2016 10:12:40 GMT -6
Quick question to the JCL MP 250A and the Roketa with the Linhai 260 owners. Can I work on my variator without taking my Cadillac fenders (big rear body wrap around) off if I'm careful ?
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Junior
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Post by 4950cycle on Aug 22, 2016 10:11:14 GMT -6
Quick question to the JCL MP 250A and the Roketa with the Linhai 260. Can I work on my variator without taking my Cadillac fenders (big rear body wrap around) off if I'm careful ?
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Post by 4950cycle on Aug 22, 2016 9:57:10 GMT -6
Aug 9 2016 at 6:10pm jct842 said: First thing I would look at is the rpm at the top speed you get now. Depending on if it is wound out or not to decide on what weights you have and what you need to go to. If you don't have a tach get one on there. If you are a whole lot under red line you need to go lighter in weights which is what I would suspect. Doubt if you will be happy with a larger carb with out doing other mods to go with it. Jetting is usually all that is needed. Folks, Take jct842's post to heart ! And do not buy a 32mm (BS) more like 31mm racing carb they call it.  The one I got has at least a 125 main jet which is way to big unless you are gonna mod the rest of the breathing system and maybe even port and cam it. Just do what he says. Don't be a Hard head like me. Read more: scooterdoc.proboards.com/thread/13008/mph-more-top-speed-mp250a#ixzz4I4lXi1wE |
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Post by 4950cycle on Aug 21, 2016 21:06:57 GMT -6
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 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 ?
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Junior
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Post by 4950cycle on Aug 21, 2016 20:36:37 GMT -6
Well, I put in the 32 mm carb today. Lost some acceleration and gained ZIP / nodda on the top end. It has a main jet the size between a #56 and 57 drill bit. I know because I checked. The seller said it is a 150 main jet (no markings) I think. I will at least have to back off to a 138 Main jet. I would bet money I'm running rich. Havn't checked the plug yet. Got dark on me. BTW I bet this 32mm carb is no more than a mm bigger than the Japanese made stock carb. Definitely do not buy one of these. Just mod your own. Save $100
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Junior
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Post by 4950cycle on Aug 21, 2016 20:33:52 GMT -6
Well, I put in the 32 mm carb today. Lost some acceleration and gained ZIP / nodda on the top end. It has a main jet the size between a #56 and 57 drill bit. I know because I checked. The seller said it is a 150 main jet (no markings) I think. I will at least have to back off to a 138 Main jet. I would bet money I'm running rich. Havn't checked the plug yet. Got dark on me. BTW I bet this 32mm carb is no more than a mm bigger than the Japanese made stock carb. Definitely do not buy one of these. Just mod your own. Save $100
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Post by 4950cycle on Aug 20, 2016 22:46:39 GMT -6
Got detoured on my little project. My fuel pump quit so I ordered another one . 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. Hell, 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 won't become a nightmare to make run right. Read more: scooterrebels.proboards.com/thread/2676/miles-hour-257-linhai-jcl#ixzz4Hw8ffDzv |
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