Andy bauska 27 Posted January 20, 2022 (edited) So, I am having some trouble with my 300 losing spark at higher speeds. I thought it was carburation, to test this I swapped carbs on our other 1993 Honda, (mine's a 1993) and the other one runs perfect no matter which carb I put on it. I hooked a test light to the coil, and it sure enough was losing spark on the top end. It idles perfect tho. It should also be noted that it's the worst in the mid throttle range, and not the top end. So, we changed the spark plug, put 3 different coils in it, and 3 different cdi boxes in it, and still nothing. We tested the pulse generator, and it was 359.8 ohms, and the spec in the book is 360. I haven't swapped it to a different one, but I bought a new one, and it's on the way. I however don't think it'll fix it. but you have to start eliminating variables somewhere. I took apart all the plugs I could find, and put die electric grease in the connections, and still nothing. All the plugs fit good and tight, and snap in. I'm running out of things to try, so any suggestions are welcome. Thanks to any response. Edited January 20, 2022 by Andy bauska Share this post Link to post Share on other sites
ATC4ever 881 Posted January 20, 2022 Any chance the exciter coil (pulse generator) is weak & once the speed of the current is higher its fading out? Could be fine just testing it alone. I'd wait till you get the new one to see. Share this post Link to post Share on other sites
Andy bauska 27 Posted January 20, 2022 I think this might be the case, and I really hope the new one fixes it. If it doesn't, what would you recommend I try next? Share this post Link to post Share on other sites
WonderMonkey 653 Posted January 20, 2022 1 hour ago, Andy bauska said: I think this might be the case, and I really hope the new one fixes it. If it doesn't, what would you recommend I try next? I suggest drinking heavily. 1 Share this post Link to post Share on other sites
Andy bauska 27 Posted January 20, 2022 Sorry bro, drinking doesn't get rid of my problems, it only worsens them. Plus, I am not 21 yet. Also, what kind of response is that? If you don't have anything good to contribute, then don't contribute at all. 1 Share this post Link to post Share on other sites
WonderMonkey 653 Posted January 20, 2022 5 minutes ago, Andy bauska said: Sorry bro, drinking doesn't get rid of my problems, it only worsens them. Plus, I am not 21 yet. Also, what kind of response is that? If you don't have anything good to contribute, then don't contribute at all. It was just a light-hearted response. Take it as such. I will continue to interject things for my amusement, though not on your posts. I appreciate the heads up on how you like to interact. Share this post Link to post Share on other sites
shadetree 5,448 Posted January 20, 2022 1993 trx300fw's are a hit and miss on c.d.i.'s, one of the worse years for them. are you using a oem c.d.i. ?, or are these after market ? ( china ). i can tell you right now, most of the problems you are having is related to rpms, which are built into the c.d.i.'s. my money say's its the c.d.i. you MUST have a 1993 oem c.d.i. for this to run out through all rpm's. 2 Share this post Link to post Share on other sites
jeepwm69 6,601 Posted January 20, 2022 29 minutes ago, Andy bauska said: Sorry bro, drinking doesn't get rid of my problems, it only worsens them. Plus, I am not 21 yet. Also, what kind of response is that? If you don't have anything good to contribute, then don't contribute at all. Lighten up Frances. We joke around a lot here. What "3 different CDI boxes" did you try? OEM, Rick's, or china junk? Did you swap the CDI from the good running 93 to the one with issues? If so, is it OEM? 3 Share this post Link to post Share on other sites
Fishfiles 17,097 Posted January 20, 2022 I seem to remember you were 18 a couple of years ago on HondaATV, so your about 19-20 now , right ? Some CDIs limit the RPMs , some CDIs are no limit ----- on a first gen 300 it is about 1,000 -1,200 higher --- I believe the 93 CDI was the last year of no limit Share this post Link to post Share on other sites
Andy bauska 27 Posted January 20, 2022 I didn't mean to offend you all, I thought it was some guy just trying to waste my time. Anyway, the cdi in it is the original from 1993. I swapped it to the original from my dads' 1991, and I also put a Ricks one in it too. My brother bought it for his 1990, but oddly enough it wouldn't run. It however made mine run. I am 17 at the moment and will be 18 in late June. Also @WonderMonkey, I overreacted, and I shouldn't've responded the way I did, and all my friends say I have a good sense of humor, So feel free to joke around. Didn't mean hurt anyone's feelings. 3 Share this post Link to post Share on other sites
jeepwm69 6,601 Posted January 20, 2022 3 minutes ago, Andy bauska said: I didn't mean to offend you all, I thought it was some guy just trying to waste my time. Anyway, the cdi in it is the original from 1993. I swapped it to the original from my dads' 1991, and I also put a Ricks one in it too. My brother bought it for his 1990, but oddly enough it wouldn't run. It however made mine run. I am 17 at the moment and will be 18 in late June. Also @WonderMonkey, I overreacted, and I shouldn't've responded the way I did, and all my friends say I have a good sense of humor, So feel free to joke around. Didn't mean hurt anyone's feelings. WM is a crotchety old man. You didn't hurt his feelings. He probably doesn't have any feelings anymore LOL As Shade said, the 93 is an oddball CDI that was one year only. Where did you source the Rick's CDI and what's the part number? Lots of fake Rick's CDI's out there, so if you didn't get it directly from Rick's it's suspect https://ricksmotorsportelectrics.com/Hot-Shot-Series-Honda-CDI-Box-15_612 I'm with @shadetree, my first impression is you have an iffy CDI and a bunch of incompatible extra CDI's that you're swapping in. 1 Share this post Link to post Share on other sites
Andy bauska 27 Posted January 20, 2022 Man, I don't think so, because the machine makes the exact same symptoms no matter what box I have in it. Share this post Link to post Share on other sites
Andy bauska 27 Posted January 20, 2022 That's probably the same one my brother bought for his 1990 300. Share this post Link to post Share on other sites
Fishfiles 17,097 Posted January 20, 2022 1993 CDI is not a one year CDI , 88-93 are the same Share this post Link to post Share on other sites
Andy bauska 27 Posted January 20, 2022 So, in theory, it shouldn't be the cdi, because everyone I tried is for an 88-93. I've tried a 90, 91, and 93 Share this post Link to post Share on other sites
jeepwm69 6,601 Posted January 20, 2022 Just saying, the parts fitment shows 1993 only on that CDI. Could be something else, but if it's spark related I'm betting on the CDI. https://www.partzilla.com/product/honda/30410-HC5-971?ref=19534d12b6b6e302720a48e4dc67a75467470c8c Share this post Link to post Share on other sites
Fishfiles 17,097 Posted January 20, 2022 11 minutes ago, jeepwm69 said: Just saying, the parts fitment shows 1993 only on that CDI. Could be something else, but if it's spark related I'm betting on the CDI. https://www.partzilla.com/product/honda/30410-HC5-971?ref=19534d12b6b6e302720a48e4dc67a75467470c8c Here is the interchange , it says 89-93, but I know people who have replaced the 88 with a first gen and it worked Description Honda 30410-HC4-770 IGNITION CONTROL MODULE Genuine Honda Parts Manufacturer: Honda OEM Part Number: 30410-HC4-770 Part: IGNITION CONTROL MODULE Warranty This OEM part is guaranteed by Honda's limited part warranty Support We have parts professionals who can answer your questions Fitment Assurance We guarantee fitment for this product Fitment This product fits the following: Honda ATV 1993 TRX300FW A - FOURTRAX 300 4X4 Related Fitment This Honda 30410-HC4-770 IGNITION CONTROL MODULE fits the following models and components: Honda ATV 1993 TRX300 AN Wire Harness Honda ATV 1990 TRX300 A - FOURTRAX 300 Wire Harness Honda ATV 1991 TRX300 A - FOURTRAX 300 Wire Harness Honda ATV 1993 TRX300FW AN - FOURTRAX 300 4X4 Wire Harness Honda ATV 1992 TRX300FW AN - FOURTRAX 4X4 Wire Harness Honda ATV 1993 TRX300 A - FOURTRAX Wire Harness Honda ATV 1993 TRX300FW A - FOURTRAX 300 4X4 Wire Harness Honda ATV 1989 TRX300 A - FOURTRAX 300 Wire Harness Honda ATV 1992 TRX300 AN - FOURTRAX 300 Wire Harness Honda ATV 1991 TRX300FW AN - FOURTRAX 4X4 Wire Harness Honda ATV 1991 TRX300FW A - FOURTRAX 4X4 Wire Harness Honda ATV 1992 TRX300 A - FOURTRAX 300 Wire Harness Honda ATV 1991 TRX300 AN - FOURTRAX 300 Wire Harness Honda ATV 1992 TRX300FW A - FOURTRAX 4X4 Wire Harness Honda ATV 1990 TRX300FW A - FOURTRAX 4X4 Wire Harness Share this post Link to post Share on other sites
jeepwm69 6,601 Posted January 20, 2022 Heck Fish, you've forgotten more about 300's than I'll ever know. Looks like two different CDI part numbers. One shows a range, the other shows 1993 only. Probably a superceded part number in there somewhere. Share this post Link to post Share on other sites
Andy bauska 27 Posted January 20, 2022 Idk, But I'll install the pulse generator when I get it and see if it fixes it. If not, I'll investigate cdi. 1 Share this post Link to post Share on other sites
WonderMonkey 653 Posted January 21, 2022 4 hours ago, Andy bauska said: I didn't mean to offend you all, I thought it was some guy just trying to waste my time. Anyway, the cdi in it is the original from 1993. I swapped it to the original from my dads' 1991, and I also put a Ricks one in it too. My brother bought it for his 1990, but oddly enough it wouldn't run. It however made mine run. I am 17 at the moment and will be 18 in late June. Also @WonderMonkey, I overreacted, and I shouldn't've responded the way I did, and all my friends say I have a good sense of humor, So feel free to joke around. Didn't mean hurt anyone's feelings. Nah, no feelings hurt. I was just playing fun. And yes, it was wasting someone's time for sure, as does most fun. I was just playing around and not intending to cause any trouble. At the next ATV Honda meetup, I'll buy you a beverage of choice, whatever it may be. Jump into chat sometime when people are there, will will THEN commence to wasting some time. 1 Share this post Link to post Share on other sites
Andy bauska 27 Posted January 21, 2022 Where is the next atv meetup? Sounds like fun. Me and my old honda would love to come! Jeepwm69 said you were old, so how old are you? Share this post Link to post Share on other sites
shadetree 5,448 Posted January 21, 2022 42 minutes ago, Andy bauska said: Where is the next atv meetup? Sounds like fun. Me and my old honda would love to come! Jeepwm69 said you were old, so how old are you? lol, he's in his 30's if my memory is still good ?..lol. 1 Share this post Link to post Share on other sites
jeepwm69 6,601 Posted January 21, 2022 43 minutes ago, Andy bauska said: Where is the next atv meetup? Sounds like fun. Me and my old honda would love to come! Jeepwm69 said you were old, so how old are you? About as old as me, but not as old as Shadetree. Nobody’s as old as Shadetree, lol. 1 Share this post Link to post Share on other sites
shadetree 5,448 Posted January 21, 2022 2 minutes ago, jeepwm69 said: About as old as me, but not as old as Shadetree. Nobody’s as old as Shadetree, lol. shush !!..lol. 2 Share this post Link to post Share on other sites
Andy bauska 27 Posted January 21, 2022 Haha, 30's isn't that old. How old is Shadetree? And where is the atv meetup? Share this post Link to post Share on other sites
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