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Post by rapidjim on Nov 19, 2014 7:43:28 GMT -6
Valve adjustment is part of routine maintenance and should be performed at 800 miles.
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Post by rapidjim on Nov 10, 2014 8:35:41 GMT -6
WOW!! Great Find man that is weird and who would of thought of anything like that causing loss of compression. Alleyoop Yeah I thought it was weird too that is why I made the post. Just enough flashing to hold the valve open if put on upside down. |
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Post by rapidjim on Nov 9, 2014 9:45:45 GMT -6
I got an interesting phone conversation last week concerning a customer doing his own valve adjust. After he adjusted his valves, he told me his 300 trike would turn over really fast but would not start. He said he went back and checked it again, with the same results and wanted to know what I thought. He told me how he adjusted the valves and it was the correct proceedure and gap. I asked him if he could do a compression check and he said he didn't have the correct adapter for his gauges and wondered if I would take a look. About an hour later, he showed up with his Magnum on a trailer. We unloaded it and bought it in the shop. When I attempted it start it I could tell by the way it was turning over that there was zero compression. So I did a leak down test and had air coming out of the carb, hmmm did he clip the intake valve? As I was removing the intake valve cover, to inspect the rocker, I heard a snap noise. Didn't really pay to much attention to it at that moment. Checked the lash and it was correct. Rotated the motor to watch the rocker movement and at this time we had compression. I removed the leak down tester and verified compression. Now I am puzzled. Look into the intake valve side with a flash light and didn't see any junk inside. As I picked up the valve cover, it slipped out of my hand, when I picked it up this is what I saw  It appears that the oil deflection flashing was holding the intake valve slightly open. Unlike the exhaust valve cover which has 3 bolt holes and can only go on one way, the intake valve cover has 2 bolt holes and will fit either way. I have not had this happen before, and never looked at the valve cover, must have been lucky each time or maybe this is only this way on the newer motors. Whatever the case, I thought it would be worthwhile to make a post so it don't happen to others. Or if it does they know what to do. |
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Post by rapidjim on Aug 29, 2014 6:58:41 GMT -6
Don't have to worry about MRP selling parts any more, they have filed chapter 7 bankrupcy.
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Post by rapidjim on Aug 21, 2014 7:20:07 GMT -6
Also I wasn't in any way pushing MRP but rather was using their demo to explain the differences in rollers versus sliders which the videos do a good job of doing. I didn't mean that you were pushing MRP at all, I just meant that his videos are more commercials than helpful. |
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Post by rapidjim on Aug 20, 2014 7:22:31 GMT -6
Just like all of MRP's videos, he pushes sales over how parts operate or how to change parts.
Rollers vrs sliders
First off, over time rollers develope flat spots which robs power and will give you engagement problems. One thing he did mention is that sliders wear evenly and that is true. Sliders do not need as much force to throw them out, so you do not loose 500-600 rpms like you would with every gram of rollers. Sliders expect around 300 rpm change verses 500-600 rpm changes with rollers.
You need to take your rollers out and find a gram scale ( your local Post Office or Jewler will have one) and find out what the weight you have now.
To get a direct interchange between rollers and sliders, go 1 gram higher on your sliders.
More information, The over simplified explaination that is very common is that heavier weights give you more top speed, and lighter weights more take off. This is true to a point, but there is extremes that will acutally cause issues.You need to match your weights to what the engine is foing or is cabale of doing. The variator weights control what is called the "constant engine speed". I'm sure you've noticed when you give your scoot full throttle it holds a certain engine speed while the vehicle accelerates. The variator controls this engine speed. If your engine is above it's maximum torque because of too light of of weight, it will not accelerate like it could. If your engine is below it's maximium torque because of too heavy of weight, it also will not accelerate well as it will bog. So, this being said, you can actually gain top speed AND acceleration by lightening the rollers. This is true for a number of reasons. Your engine has a certain engine speed, RPM, that is it's most powerful and most efficient, this is called the torque peak. You cannot get maximum performance without being at this RPM. Second, remember that the variator get to it's maximum contraction almost immediately upon acceleration, and holds there, it's the rear pulley that slowly contracts as rear wheel speed increase, therby increasing the ratio between engine and wheel, making for more road speed.
To conclude and simplify: lighter rollers increase the "constant engine speed", and heavier rollers decrease it.
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Post by rapidjim on Aug 17, 2014 7:54:59 GMT -6
Having personal experience working on the reverse trikes, I have to agree with Alley. The issue is with the front ends and getting them aligned correctly and keeping them that way. The other issue, is getting parts that are specfic to that trike. That is why Ice Bear quit selling them years ago. They couldn't even get parts from the distributor that they were getting the trikes from.
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Post by rapidjim on Aug 3, 2014 9:08:37 GMT -6
EPA standards are set for sea level. Of course a carb will run richer at altitudes because of less air. 7500 ft is only a mile and a half above sea level LOL. When I moved from Denver to Wi I had to rejet my Harley.
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Post by rapidjim on Aug 2, 2014 7:33:49 GMT -6
JR is right in what he says. To add to this, experience has taught me, in both the automotive and motorcycle world, the last thing you want to mess with is the exhaust. Changing the back pressure of an exhaust system does in fact get the exhaiust out faster and that is what you want, however doing so also changes the air/fuel mixture requirements for an
engine. Just bolting on a set of headers and glass packs can accually cause you to lose performance, same with just changing to drag pipes. Every machine that I have modified the exhaust on has required carb mods in one way or another.
You have to remember that Ice Bear 300s used to have a single exhaust and the motor was tuned for that exhaust, when they modded the 300s to dual exhaust, they did not just bolt something on to look cool. There was design issues and also the dreaded passing of USA EPA standards. Also, Chinese Scooters are lean to start with to pass EPA standards.
Where this person is right about exhaust systems, what he fails to tell you is that the tuning and the power of the motor must match and that can get spendy.
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Post by rapidjim on Jul 28, 2014 8:02:01 GMT -6
One thing one can be sure of with an Ice Bear scooter is that if the part you need is only available from THEM, it ain't gonna be cheap. But one hears all the time that in general, trike scooters are simply two-wheelers that somebody modified to be a trike. That suggests that if you know what two-wheeler was the starting point for a trike, you might find some of the more common parts at the various on-line vendors at better prices. So my question: does anybody happen to know what two-wheeler is the "parent" of the Ice Bear Magnum? They call it a 300, but the engine is actually something like 276cc. I'm wondering about this because my Magnum wouldn't start this morning, and upon opening the engine compartment I found that the air box had jiggled completely loose and was just bouncing around in there, allowing outside air directly into the carb intake. Closer examination showed that the plastic tab on the airbox that is supposed to bolt to a steel bracket had broken off. I wound up manufacturing something out of semi-flexible plastic to enable me to re-secure the airbox, but if that comes loose in a few hundred miles I'll want to buy a new box. (Under the heading of "strange coincidences," I had to do something very similar to the airbox on my Roketa not long after I bought it; some metal bracket thingies INSIDE the box had broken off, and I had to build something to replace them.) And a final PS, the tab that broke off was at the front end of the airbox, and there was a second, intact tab at the back end, but nowhere was there any metal bracket or anything else on the scooter frame to which that tab could have been connected. I'm guessing that on the original, two-wheel scooter, whatever that was, there was probably a second fastening point for the airbox, and on the Magnum, having it only fastened at one point makes it prone to serious vibrations that sooner or later cause the plastic to fatigue and break. So owners of Magnums or other Ice Bear Trikes, that might be something to keep an eye on. OOPS, never say "final"! Was just googling around for filters and intakes, and saw some that it looks like you just clamp onto the air intake of the carb, no air box involved at all. But other than the diameter of the hose, how would I know which one will be the equivalent of the OEM air box and NOT adversely affect the performance of my scooter? There's a whole slew of different ones. I agree and disagree with you on your statement about parts directly from Ice Bear aren't cheap. I guess it is how you define cheap. Ice Bear's price for Ice Bear specific parts are no different than any other Chinese "Distributor" ie. Roketa, SUNL. If you think these parts aren't "Cheap" try buying parts from the "Big Four", Honda, Harley, Yamaha, Suzuki. I will agree that shipping isn't cheap, mostly due to UPS and their dimensional weight shipping practice. How much weight can fit into a certain size box. Hoepfully you will never need a major size body part like a rear deck, you will pass out on shipping charges. The motor part of a 300cc trike is a LinhaiVog motor, with one exception, the standard Linhai/Vog piston will not fit an Ice Bear, the skirting and wrist pin hole placement is different, which tells me so is the crank. Now saying that, external common parts are available aftermarket from places like Scrappydog and Partsforscooters. You just have to know what you are buying. Most of the time I get my 300 parts directly from Ice Bear because I know they are the same part. As far as your air box and carburation is concerned. Chinese machines are manufactured to run lean to pass the EPA and CARB standards. Any changes to the air box will cause a leaner condition, therefore, if you go to a free flow air filter, you are allowing more air (leaning it out) and have to rejet to compensate. This is why more and more scooters are going to fuel injection. Ice Bear is thinking of doing the same thing, at this time it is just thinking. Of course if they do the price of the machine will go up. If you are not confortable in spending the time of rejetting, I would suggest you stay with the original air box or take it to a shop that can do it for you. Just for the record, I have only ever sold one air box for a 300cc, now the 150cc is a different story. Ask Alley about that air filter LOL. |
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Post by rapidjim on Jul 19, 2014 9:04:51 GMT -6
Hi Jim, alleyoop was asking model, so I text this gut, he said it is a Hunzou Dixie, I have a pic and the other thread. would the 150cc haul me ok I'm around 225lbs. Yep It is an Ice Bear, the name he gave you is the long chinese factory name that is on the title. I weight 215 and have no issues with a 150. Even less issues with Alleys after it was modded LOL |
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Post by rapidjim on Jul 18, 2014 7:19:58 GMT -6
All Chinese conventional trikes (2 wheels in the back) are Ice Bear. $1300 for it is a really good price as long as reverse still works. People are still getting $1800 to $2000 for them. Ice Bear discontinued the reverse in the 150 trikes in late 2009.
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Post by rapidjim on Jun 19, 2014 7:13:03 GMT -6
Finding someone to get you parts for a reverse trike is a chore. Others have been in the same boat you are. Some universal parts may fit. If you post a picture of your switch with a picture of the wiring configuration we may be able to help you
Jim
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Post by rapidjim on Jun 1, 2014 8:16:10 GMT -6
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Post by rapidjim on May 26, 2014 7:59:54 GMT -6
Another year has pasted and once again it is Memorial Day, a day to rememeber those who have gone before us and those that still remain. Today many folks will be visiting the grave sites of fallen veterans, some will have honor guards and ceromonies and some will be solice. A day of reflection and remembering. Flags at half mast as our country remembers. Please take a moment today to remember those that have pasted and those that remain.
If you come across a vet today please thank them for their service.
Thank you to all my brothers/sisters in arms, welcome home, and to those that are gone from us, You are remembered.
Jim/MSGT USAF Retired
1971-1991
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