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Post by royldoc on Jul 7, 2013 19:56:01 GMT -6
This is going to be a step by step of how to replace the oil pump on a qmb139 engine. Step 1: drain the oil and unplug stator harness Step 2: Remove the fan cover (it is not necessary to remove the complete shroud) Step 3: remove the fan Step 4: Remove the flywheel nut and use a flywheel puller to remove the flywheel.(be careful not to lose the small key in the crankshaft)  step 5: Remove the ignition trigger coil.(it is not necessary to remove the stator coils)  Step 6: remove the eight bolts holding the crankcase cove to the case.(keep track of which holes the bolts come out of as they are different lengths) You my need to tap the cover with a plastic/rubber mallet to free it up. (be careful to not lose the two locator dowel pins) Step 6: Remove the oil pump gear, remove the three oil pump bolts, remove the pump. (there is two o-rings behind the pump to seal the inlet and outlet ports)    Roy |
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Post by royldoc on Jul 7, 2013 13:19:39 GMT -6
Jim knows how its done. His customer service is second to none.
Roy
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Post by royldoc on Jul 7, 2013 13:14:50 GMT -6
I just don't get how 3 wheels in tandem would be better. Sure does make it ugly though.
Roy
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Post by royldoc on Jul 7, 2013 13:05:48 GMT -6
Magneto?
Stator coils: I.D.= 29mm, O.D.=88.5mm
Flywheel: I.D.=90mm, O.D.=109mm
Roy
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Post by royldoc on Jul 7, 2013 11:22:13 GMT -6
Ooh, ooh, me. You know I'm interested. I want this like yesterday.
This would be a big help on the charging of the battery while running the efi system. The problem is the fuel pump puts my 8 pole stator right at the limit of the charging system.
Roy
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Post by royldoc on Jul 5, 2013 15:36:24 GMT -6
It is possible to tell what length valves are in the head with out tearing the engine down. You just have to remove the valve cover. Set engine so the piston is top dead center and measure the height of the springs above the head. 69mm valves will be 10mm above the head and 64mm valves will be 5mm above the head. You can also measure the distance between valve stems.  Roy |
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Post by royldoc on Jul 4, 2013 22:31:12 GMT -6
The gear and oil pump go inside the right side case cover. You must remove the flywheel, stator, and case cover to replace the pump.  There are two different oil pumps for these engines. One uses a 22 tooth drive gear on the crankshaft and a 47 tooth driven gear on the pump. This gear is made with the gear pressed on the shaft and the shaft is inserted into the pump. The other uses a 16 tooth drive gear on the crankshaft and a 33 tooth gear on the pump. This gear is fixed to the pump shaft by a nut. These two pumps are not interchangeable. You must change the gear on the crankshaft. Also the locator dowel pins are in different locations on the two pumps.  Notice the position of the dowel pins. The pump on the left uses a 47 tooth driven gear, the pump on the right uses a 33 tooth driven gear.   The pumps are also a different thickness Roy |
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Post by royldoc on Jul 4, 2013 18:47:35 GMT -6
Several years ago when I got my first scooter I decided to do a bbk, head included. The heads do not come with a rocker arm assembly, so I thought I could use the old assembly. When I finally got it together I found that the adjustment screws where to short. The stock head had 69mm valve and the new head had 64mm valves. I could get them to the proper gap but couldn't get the lock nut on them. So I did some research and found someone else had the same problem. The suggestion was to put the nuts on the bottom of the rocker arm. This didn't seem right to me so I did more research. This is when I found out that heads came with two different valve lengths. The rocker arm assembly frames are the same for both heads, the difference is the rocker arms.
Roy
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Post by royldoc on Jul 4, 2013 17:48:46 GMT -6
Did you replace the head with the bbk? It sounds like you are using a rocker arm assembly for 64mm valves on a 69mm valve head. I found that most stock heads have a valve length of 69mm while most after market heads have a valve length of 64mm.
Valve lash is the gap between the valve stem and the rocker arm.
Roy
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Post by royldoc on Jul 3, 2013 8:25:54 GMT -6
CDI is short for capacitor discharge ignition. Capacitors in the module are charged up. When a pulse from the trigger coil is made by the flywheel the capacitors discharge through the ignition coil causing a spark to jump the gap of the spark plug. This is just a brief description of how it works.
Roy
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Post by royldoc on Jul 3, 2013 0:28:41 GMT -6
Wow, That sure is purdy!
Roy
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Post by royldoc on Jul 3, 2013 0:17:35 GMT -6
Looks like Alley has answered your questions. 1) Yes this is a good brand for chinese made scooters, but still not the quality of higher priced name brand scooters. With a little TLC they will give you years of riding. 2) Like Alley stated they are all pretty much the same except for some minor differences. The Zodiac is the newest model and has a few more upgrades than the others. 3) When I decided to buy my first trike in 2010 I found that there are very few brick and mortar dealers that sell ice bear scooters. I was surprised that even in the KC metro area there was not one. I live in Missouri, although it doesn't get as hot here is routinely gets to the upper 90's and can get into the low 100's, but generally in the lower 90's. I have not had any trouble with heat issues. Alley covered just about everything, so no sense in my typing it over. Like he said if you need more info, just ask. Oh, I forgot in the other post you asked what where the pro's and cons of a trike. I'll start with the cons. They are not as agile as a two wheeler. For the same sized motor two wheeler they will be a little slower, as they are heavier. They are wider so you can't zip between lines of slow cars like you can on a two wheeler. I'm probably forgetting some, but you may get the idea. Now for the pros. You don't have to worry about balance. When you stop you don't have to put your feet down and hold it up. You don't have to lean to turn it. You don't have to remember to put a kick stand down or try to put it up on a center stand when you get off of them. They do steer different than a two wheeler, You actually drive a trike rather than ride one. To turn you have to turn the handle bars in the direction you want to turn rather than leaning. You do have to slow down more for a turn and take turns a little wider. I have rode motorcycles most of my life and find myself still trying to lean in the turns. I hope all this helped.  Roy |
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Post by royldoc on Jul 2, 2013 12:00:46 GMT -6
Howdy folks! I was told about this place from a friend of a friend. I was told I could get some good advice from all you experienced owners. I have a couple questions. I have been looking to buy a new vehicle and have come to the conclusion that my best bet will be a scooter. The gas mileage is unbelievable! I can't decide between the magnum, tornado or the zodiac. Can anyone give me the pros and cons? The differences? This will be my first scooter or even my first anything like this. I'm having trouble getting the IceBear company to answer my emails and I'm hoping you all can help. Hello and welcome. So, you want to enter the wonderful world of scooters. I like your choices. You may want to start a new thread asking your questions, so that more people may respond. I am short on time and have to go, but will be back later to help answer some of your questions. Roy |
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dog got me
by: royldoc - Jun 25, 2013 23:39:33 GMT -6
Post by royldoc on Jun 25, 2013 23:39:33 GMT -6
Sorry to hear about your accident with the dog.
Luke, I have 2 scooters a 50cc that I don't have to register every year ect.. I do have insurance on it even though I am not required to , but do just in case. I use it for short trips, To stores, fast food places, friends that live close, ect.. All within 5-10 miles of home. I have been known to ride it more than a 100 miles a trip though. Sometimes I just cruise around the neighbor hood, (speed limit only 25) I like to check out the hood and see whats new ect. I like it for just putting around because it gets a little better gas mileage than the 300. I have the 300 for longer trips that I may have to ride 45 - 70 mph. Even though I can only ride one at a time, each has a purpose.
Roy
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Post by royldoc on Jun 16, 2013 18:47:50 GMT -6
I cut a piece of foam about 3 inch square folded it in half and just stuck it in there I didn't even tape it. The person I got it from had a blue dish washing sponge in it, I wondered why. I found out when I removed it. I then replaced it with the foam.
Roy
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