strike250

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strike250 last won the day on April 21

strike250 had the most liked content!

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About strike250

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    Advanced Member
  • Birthday
  • Location Lakewood, CA, USA

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  • Website URL
    www.250utv.com

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  • Gender
    Male
  • Interests
    Retired U.S. Marine, U.S. Army, U.S. Navy veteran. Iraq, Afghanistan, Africa, Europe and more. Combat wounded.
  • UTV Brand
    hisun

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  1. Slow 2017 HiSun Strike 250

    I wanted to spill the beans sort of with some exciting news! Next year there is a national event that will be televised that will have youth UTV racing with only HiSUN Strike 250's. I am working with HiSUN and another group to get this off the ground. We are working out the details now, but it should be exciting to watch HiSUN Strike 250's tear up the track, racing along side other HiSUN 250's. I can't say much more now, but when allowed, I will tell you folks more about it in the coming months. I was lucky enough to be chosen as the supplier of race parts for this event. They will also be using the new HiSUN Strike 550 and the Strike 1000. So three classes next year should be a great year.
  2. Slow 2017 HiSun Strike 250

    I have a lot of contacts at HiSUN, and we work together to help everyone out there with questions. Remember, I am not employed by HiSUN, but rather a person that started out just like you, buying one of these units and looking for help. If I don't have the answer, I will get it.
  3. Slow 2017 HiSun Strike 250

    This is something I do for the folks out here on the westcoast that race these units. They want all the speed they can get. I do change out the transmission gears as well as rear sprockets, ECU tuning, and of course our exhaust system.
  4. Slow 2017 HiSun Strike 250

    I can get the 2015 ECU, but its pretty easy to just send me yours and I will re-flash it for you. I normally charge up to $100 for this, as a new ECU is about $344.00. You would only need to purchase a new ECU if you wanted a stock one and a modified one to exchange. I will do it for $80.00 for any customers from this site.
  5. Slow 2017 HiSun Strike 250

    I have a guy I use that is an authorized HiSUN parts supplier. You can get him at: [email protected] Let him know you hear of him from 250UTV.com and he will take care of you. He also does a great price for my customers.
  6. Slow 2017 HiSun Strike 250

    On our 2015 unit we use for R&D, I think we have had the RPM close to 8750. But I am not sure how reliable the gauge is in the dash. We are doing some dyno testing currently. I will check the dyno for a good readout. I am not sure about going to a 38 in the rear with the newer internal gearing, but with our ECU flash and a 40 rear tooth, it should help a lot. We are now selling rear sprockets that are split. This allows you to change the rear sprockets in the rear without removing the entire axle assembly. The new split sprockets will be up on the site by monday. But we do offer a new re-flash on the ECU. Just send in yours and we will re-flash it, or unlock it as it is sometimes called. Keep in mind, with many rear sprocket changes, you might end up having to remove a link in the chain if you go to small in the rear due to the limits of the chain adjuster slot. We are also offering updated chain adjusters, easier to adjust than the OEM version.
  7. Slow 2017 HiSun Strike 250

    The old parts numbers for the pre-2016 250's internal transmission are: MAIN SHAFT P013000222010000 $75.00 (OLD PART #) MAIN SHAFT P013000222010200 $75.00 (NEW PART #) OUTPUT SHAFT 22300-013A-0000 $140.00 (OLD SHAFT) OUTPUT SHAFT 22300-013-0000 $140.00 (NEW SHAFT) COUNTER SHAFT 22220-013-0000 $105.50 (OLD SHAFT) COUNTER SHAFT 22220-013-0001 $105.50 (NEW SHAFT)
  8. Slow 2017 HiSun Strike 250

    There is no change to the clutch assembly, both the primary and secondary clutch assemblies are the same in all years. They changed the gearing on the shafts in the transmission which has a direct relation to the output shaft speed. This along with the rear gearing and the modified ECU, keep the 250 at a to speed of about 32 is mph. It also controls the RPM so that the clutch wont engage all the way. I am able to open up the ECU through software programming. Also I have sprockets for the rear to allow a better top end speed. But to change everything back to the pre 2016 version, you would have to split the cases, and change the three shafts inside the transmission. This is not a realistic option for most. So, with the ECU opened up and set to pre-2016 flash, and the rear sprocket at about a 40 tooth, it seems to help a lot. You will get a higher top end but still keeping the off the line speed most of us enjoy. I call it a compromise.
  9. Slow 2017 HiSun Strike 250

    Wow, what great questions. I will do my best to answer them. First off you had asked about the EFI Delphi MT05 module has been altered since 2017. they did change things to slow down the UTV per customers complaints that it was going too fast. So, being the large company HiSUN is, they wanted to avoid any litigation in court and damages. They altered the vehicle in question to slow it down. They did this by doing a couple of things, one of them was to change the mapping in the ECU to control the top RPM limits. Second was to change the gearing. This was done in two ways, first was changing the final gear ratio from 11 front sprocket and 38 rear sprocket, to a 11 front sprocket and a 42 rear sprocket. The second thing was to change the internal gearing. They changed the main shaft in the transmission, the output shaft and the counter shaft. They all have gears that when changed with the final gear ratio helps keep the unit down on top end speed.
  10. Never, now we all know lol
  11. hisun strike 250

    Here are a couple of pics of our new Trailer Hitch for the Sector 250. And no, it doesnt hit the chain when the unit is compressed lol. It bolts on, is powder coated and attaches to the units frame. It has a standard small 1 1/4 inch receiver.
  12. Hisun Sector/Vector 250 Service Manual?

    The only real difference is the plastic. Otherwise the vehicle is pretty much the same. The engine, suspension, electronics and all are all the same as the Strike 250. The only difference is the shift linkage, and the rear body. Even the OEM service manual is not 100% accurate either, so if you have any questions, please feel free to just ask and I will do my best.
  13. Slow 2017 HiSun Strike 250

    Don't forget about the new exhaust pipe
  14. Well, we have finally finished our new exhaust system for the Strike and Sector 250. It bolts right on, weighs 6.2 lbs lighter than the OEM muffler assembly. It is rated for no more than 94db for trail and track regulations. It also sounds and works amazing. We have priced it out at $299.99, far below anyone else making a system for these units because we want to give those who have been waiting a while for them a price break. It is also spark arrester approved.
  15. Slow 2017 HiSun Strike 250

    Hello there, I know about the early cut out on the newer models. As for the RPM limit, I have seen the gauge and know it says a high RPM, but a few things come into play about that. First off is that most gauges show a higher than capable limit, in cars, truck, motorcycles and more. This is to give the illusion that the vehicle can go crazy with the RPM range. Reality is that most vehicles have a RPM limit below what the gauge actually says. This is for reasons of reliability and engine safety. The HiSUN is good till about 8000 or so RPM. Anything over that and the horsepower starts to fall. On the newer ones the gearing is also changed. The rear sprocket is a 42, and used to be a 38. The spark cut out to limit the speed to around 30 can be changed with some ECU programming. We are changing the rear sprockets to 40 and opening up the ECU and installing the tune of the 2015 ones. They seem to run pretty good with this configuration. When an engine revs too high, some things can happen. One of the most dangerous things is to have the valves float and that could lead to the valves hitting the piston causing damage. The second thing is the loss of power when it revs too high. the engine and cams can only produce power until a certain level, so all that noise will no nothing for more power, just make it sound like a buzz box. So again, the answer to your question is that it can safely rev up to about 8750. but the power really stops at around 8000. In these small engines, they really rely on torque, and that is produced down low anyhow. Since they only have about 12 to 15 hp stock, even with a race set up, it will go to about 20 ish. which means not a lot of hp to get these things moving. they really crave the torque to get them up and going, and that is produced at a lower RPM rather than a high one. I hope this answers your question.