Looking to get a 5 gallon can of T4 this weekend to put into my 2024 CRF250R. I bought the bike brand new from a dealership last year and it's been sitting at my mom's house due to not being in good physical shape to ride(gained a lot of weight from drinking....). It only has 20min on it and is practically spotless besides dust and spider webs...
Anyways, do you guys think it's safe to throw right in since it's spec'd for stock 4-stroke engines? Or should I send it out to twisted development for a fresh tune(also looking to purchase Pro-Circuit Ti-6 full exhaust)?
I keep hearing bad things about the 2022-2024 CRF450R and RWE bikes but I haven't really opened up my bike to know if the tune has buggs. I have no idea what gas the dealership put in it either so I drained it out after 20min.
Also, I'm having a starting issue. Not really an issue but at 50F+ I still have to use the fast knob to start it. I have to press the starter for 1-2 seconds then let go, then hit it again and it starts right up. I wonder if I "Reset" the ECU it will fix that issue by disconnecting the negative terminal of the battery for 5 seconds then plug it back on like I do on my Honda cars
FYI, when I went to pick up the bike the "mechanic" or who ever you wanna call the guy who assembled the bike started it up with the fast knob out and it started right up. What he did next made me confused. He REVED it twice like 1/4 throttle right away. As you know on FI cars when you get it new it has to "learn" to idle. If you rev it right after the ECU is reset or ran for the first time on a fresh fuel trim it will struggle to idle as the rev settles. Im thinking that's the reason it has a starting issue.
What do you guys think? Run T4 and reset the ECU or should I run 91 pump first to test starting issue and have TD tune it for the gas and New England elevation and PC exhaust?
Check the link below for info on race gas
https://motocrossactionmag.com/racers-guide-to-the-hierarchy-of-motocro…
i feel like you're overthinking it. t4 is absolutely fine to run in your bike. its glorified pump gas that is consistent and something you can rely on (usually, and much more than pump gas)
Your starting issue isn't an issue at all. When you go to start your bike, just stab the starter button quick to "wake up" the ecu, you'll hear the fuel pump cycle. Wait like 2 seconds after the fuel pump shuts off and hold the button until it fires.
What was your drink of choice?
Ive seen many videos of guys starting their 22-24 250R's without the knob and it starts right up after 2 seconds and holds a steady idle. I asked a guy about his and he's like, oh yea it starts right up without having to use the knob. I even saw a video of a guy start his stating "cold start" in the video description with snow all over it and it started right up.
What you said about the fuel pump needing to prime makes sense now that I think about it... But still.. it should hold pressure. I'm forgetting it's FI!!! All the bikes I owned growing up as a kid were carbureted....
Maybe my ECU needs more recorded data?
So yea, I'll pick up a can of it this weekend and try it out.
Last 2 years it's been fireball... Before that it was Hennessy, but that stuff is too expensive lol.
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Nice..I”m a beer guy… IPA”s… T4 is fine for a stock engine…better yet, try to find a gas station that sells Non ethanol 93-95 octane would be optimal..
I run T4 in a bone stock rmz 250, works great. I often don't get to ride for weeks/months at a time so I called VP and spoke with someone there who informed me it is ok to leave it in the bike for a prolonged period of time. If it actually is, I'm not sure. They did also advise to keep the can off the concrete garage floor due to moisture.
There's none around me besides shell that sells there V-Power nitro+ but at 91 octane. Apparently it's rated at 93 RON but doesn't make sense to me. And the possibility of unintentionally mixing with lower octane that does contain ethanol and possibly water from moisture inside the in-ground tanks.
Good to know. Thanks
I run T4 in my MX bikes and roadrace. Run it and don't over think it. Also, congrats on finding something in addition to booze. MX is better.
Thanks for the encouragement. I'm seriously making an effort to quit for good.
I am not new to Moto.... Been riding since I was 10. Now that Ive purchased my first brand new bike, It's a wayyy different feeling to have a new machine. Can't wait to start hitting the track.
T4 here in my (other than pipe) stock 450 SXF. No issues, burns cleaner than pump gas and more stable/no ethanol. I have also used it as a winter storage fuel for my weed eater, pressure washer, etc.
congrats on your life change. Not easy for sure, great that you recognized the issues and sought to fix them.
Some thoughts:
Lithium-Ion battery chemical reaction is slower in cold ambient temperatures. Hold starter button and crank for a few revolutions and then let it sit for a little bit and try again. It should crank faster.
Also, I would want to compare cold starts with normal unleaded unoxygenated fuel. The RVP numbers will be higher on 93 pump-based fuel than T4.The higher RVP will help start the bike quicker in colder weather.
91 E-free is plenty. T4 will not require remapping. As long as your bike starts and runs fine it does not matter if you need the plunger or not.
My ‘21 KX 250 always started without it and one day decided it wouldn’t. No notable change in performance that I can detect.
T4 in a 17 FC450 with a pipe and stock ECU reflash. Runs great. I ran some 91 pump gas and it actually stalled once on me at low speed. I have a Rekluse and can't remember the last time it stalled in chop and on the brakes.
Finally had the the time grab a can.
It smells like..... my moms hairspray lol
The temp is 32F. I reset the ECU by disconnecting the battery and it the starting pattern hasn't changed. I thought, it probably still has the old dealership gas in the fuel pump/ fuel line so I took it for a quick 2min ride after I filled it with T4. Smells the same to me but barley rode it/ let idle and with the cold air, it's kind of hard to tell. Just trying to burn up the old gas still in the pump/hose.
Also, after the quick ride., I turned the idle back up to its original position because I had turned it down. i think the factory idle is 2k RPM?
EDIT:
The temp is 30F. I took the bike for another 2min ride today. It's started quicker. I just hit the starter with the fast knob pulled for 1 sec, then again and it fired but stalled twice probably because it's cold. I'm probably just overthinking it as one guy mentioned...😅.
The throttle response and power for a 250F is unbelievably smooth. It blows my old 03 YZ250F I had back in the day out of the water... And it had a high comp piston. I was a 125 2-stroke fan in my teen years(I had a 05' CR, 05' RM, and 05' YZ125), now I'd probably prefer a 4-stroke.
EDIT: 1/8/2024
The temp was probably 40-45F last weekend. I started the bike by pulling the fast knob, tapping the starter button to prime the fuel pump, then held the starter down for about half a second and it started right up! fastest its started since i got it. Rode it for 2 min and no hiccups. Weird to run this stuff because I've never ran race fuel and it doesn't smell anywhere close to gasoline or something you would fuel a combustion engine with.
UPDATE:
Is about 70F. Going riding tomorrow for the first time this year. At this point the pump gas has burned through and it now running fully on the Race gas.
The bike now starts without the fast knob pulled out after a few chugs. I just make sure to tap the starter to build pressure in the fuel line before I hold it down.
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