Mods for 250F engine longevity

thatswhathappens
Edited Date/Time 11/28/2022 6:47pm
Searched for a similar topic and came up empty-handed, figured I’d start a thread.

Bought a new ‘23 CRF250R two weeks ago, my first new bike, and I’m curious if there are any tricks or mods that will extend the amount of life on the engine since I’m planning on keeping this thing for many years to come.

C-level vet guy so I’m not wringing it out by any means, but are there any aspects in particular I should be looking into? Engine Ice coolant? Electric water pump? Oil change every ride? That last one’s a little ridiculous, but I’m open to any and all ideas.
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sandtrack315
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sandtrack315 11/27/2022 5:54pm
11/27/2022 5:54pm
thatswhathappens wrote:
Searched for a similar topic and came up empty-handed, figured I’d start a thread. Bought a new ‘23 CRF250R two weeks ago, my first new bike...
Searched for a similar topic and came up empty-handed, figured I’d start a thread.

Bought a new ‘23 CRF250R two weeks ago, my first new bike, and I’m curious if there are any tricks or mods that will extend the amount of life on the engine since I’m planning on keeping this thing for many years to come.

C-level vet guy so I’m not wringing it out by any means, but are there any aspects in particular I should be looking into? Engine Ice coolant? Electric water pump? Oil change every ride? That last one’s a little ridiculous, but I’m open to any and all ideas.
Twin air powerflow kit, or at least a twin air filter, can’t hurt. Get the wash cover, make sure water never gets in your intake.

Filter when it’s dirty, oil and oil filter every 5-6, check the coolant often. I use the Honda synthetic oil, 10w30.

Ride it hard, but don’t rev it just to rev it.
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DaBaum44
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DaBaum44 11/27/2022 6:00pm
11/27/2022 6:00pm
Being consistent with regular maintenance items is the best thing you can do. Four strokes are pretty darn reliable with the proper upkeep. Run a good quality oil, change it regularly, and keep a fresh air filter in it.

Do yourself a favor and grease all the bearings now, and then do it on a regular basis.
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Tiki
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Tiki 11/27/2022 6:02pm
11/27/2022 6:02pm
Get a throttle governor. Set it to never rev past 2000 rpm. You should be set. Laughing

I think they are better than they were, but aren't they still High Maintenance Engines that rev to the moon? F1 Motors might be more reliable.
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Mr. Afterbar
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Mr. Afterbar 11/27/2022 6:03pm
11/27/2022 6:03pm
Proper maintenance is all that’s needed. Maybe throw on a higher pressure radiator cap. I change oil every 2.5-3 hours and do an oil filter every other oil change. If your oil is still clean at 3 hours, go longer. My dad always said oil is cheaper than transmissions.
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Alex814
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Alex814 11/27/2022 7:24pm
11/27/2022 7:24pm
Race fuel
MxAddic
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MxAddic 11/27/2022 7:31pm
11/27/2022 7:31pm Edited Date/Time 11/27/2022 7:31pm
Stay away from Twin Air. Every one I ever used passed dirt. OEM or UNI for me.
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AH387
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AH387 11/27/2022 7:51pm
11/27/2022 7:51pm
Not that anyone is necessarily suggesting it but I would never alter your riding style to prolong a bike. Just ride it how you ride, assuming you aren't bouncing the limiter for no reason. That being said, like mentioned above, just proper maintenance is the best thing. There probably arent many mods to increase life. But modding the bike could decrease life, so be smart. Stick to basic bolt-ons. Buy good oil and keep it changed. Buy a few airfilters so you can always have a clean one handy. Put in a fresh one every ride. Get an airfilter wash plug and use it when you wash the bike. Thats about it. They are good bikes but they do need more attention than a 450, to stay nice.
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thatswhathappens 11/27/2022 8:12pm
11/27/2022 8:12pm
All good tips, thanks guys. I stay pretty solid on the routine maintenance with my four strokes, and usually keep it off the limiter when I ride, so it looks like I’ll just keep doing what I’m doing.
rhummel628
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rhummel628 11/27/2022 10:52pm
11/27/2022 10:52pm
Keep the 250 part but remove the 2 extra strokes lol.

Joking aside, everything listed above is great advice but I will add let it warm up properly. I see a lot of people revving an engine when it’s not warmed up enough.
metal_miracle 11/28/2022 12:16am
11/28/2022 12:16am
I would stay away from biodegradable airfilter oil. If you ride anywhere where its wet.
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Richy
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Richy 11/28/2022 12:44am
11/28/2022 12:44am Edited Date/Time 11/28/2022 12:44am
AH387 wrote:
Not that anyone is necessarily suggesting it but I would never alter your riding style to prolong a bike. Just ride it how you ride, assuming...
Not that anyone is necessarily suggesting it but I would never alter your riding style to prolong a bike. Just ride it how you ride, assuming you aren't bouncing the limiter for no reason. That being said, like mentioned above, just proper maintenance is the best thing. There probably arent many mods to increase life. But modding the bike could decrease life, so be smart. Stick to basic bolt-ons. Buy good oil and keep it changed. Buy a few airfilters so you can always have a clean one handy. Put in a fresh one every ride. Get an airfilter wash plug and use it when you wash the bike. Thats about it. They are good bikes but they do need more attention than a 450, to stay nice.
Agreed. In a race engine you spec valves, springs, retainers, stem seals, rod and rod bolts, etc for the RPM you expect to see for peak power and a little headroom and cap it off with a relevant rev limiter.

The rev limiter is specifically there to not let you rev it to the point of resulting damage. Yeah if you sit it on the limiter all day every day it isn't going to help anything and may well increase wear, but it has absolutely been considered by the builder - especially when the builder is a massive Japanese or Austrian OEM who build thousands of engines.

This should go double for hitting the limiter briefly in the air with practically no load on the engine, surely?
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#434
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#434 11/28/2022 1:29am
11/28/2022 1:29am
I‘ve always wondered how much longer a dirt bike would last with a little reduction in compression. Just going down from 13,5:1 to 12,5:1 should (in theory) reduce the peak load on the piston and the crank considerably. Of course, it would also cost a bit of performance.
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tobz
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tobz 11/28/2022 1:55am
11/28/2022 1:55am
#434 wrote:
I‘ve always wondered how much longer a dirt bike would last with a little reduction in compression. Just going down from 13,5:1 to 12,5:1 should (in...
I‘ve always wondered how much longer a dirt bike would last with a little reduction in compression. Just going down from 13,5:1 to 12,5:1 should (in theory) reduce the peak load on the piston and the crank considerably. Of course, it would also cost a bit of performance.
Makes you think if it would then be worth purchasing a new motorcycle just to cripple it’s performance.

Be kind to it, maintain it, replace parts when they’re tired and enjoy wringing its neck.
RaceFan
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RaceFan 11/28/2022 1:56am
11/28/2022 1:56am
I’ve owned a number of these CRFs from the 2006 model to the 2020 and never had any reliability issues. Even the ‘06 which was renowned for having valve issues never gave me an issue.
My oil change routine is every 5hrs, with the oil filter every 10. Oem oil filters only.
Someone mentioned twin air allowing dirt to pass. Never had this problem and run oem or twin air filters.

At around 80hrs the piston will need changing. The ring landings will wear but other than that they are solid bikes.
No mods required besides a pipe and suspension to match your weight.
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#434
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#434 11/28/2022 4:35am
11/28/2022 4:35am
#434 wrote:
I‘ve always wondered how much longer a dirt bike would last with a little reduction in compression. Just going down from 13,5:1 to 12,5:1 should (in...
I‘ve always wondered how much longer a dirt bike would last with a little reduction in compression. Just going down from 13,5:1 to 12,5:1 should (in theory) reduce the peak load on the piston and the crank considerably. Of course, it would also cost a bit of performance.
tobz wrote:
Makes you think if it would then be worth purchasing a new motorcycle just to cripple it’s performance. Be kind to it, maintain it, replace parts...
Makes you think if it would then be worth purchasing a new motorcycle just to cripple it’s performance.

Be kind to it, maintain it, replace parts when they’re tired and enjoy wringing its neck.
Installing a little thicker head gasket won’t cripple engine performance too much. The engine would loose a little top end and wouldn’t hit as hard. Lot’s of off road bikes have motocross engines with less compression (plus heavier fly wheels and different ECU settings) and will last much longer.
He asked for mods.. that would be one with a significant improvement on engine wear.
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lumpy790
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lumpy790 11/28/2022 5:47am
11/28/2022 5:47am
What part of Charlotte are you in Where are you going to be riding? Im down by Rock Hill SC where the cheap gas is.

I agree with you on running EI it is really great coolant. Install an hour meter so you know where you are at. Run high quality Motorcycle oil that can withstand the tortures of a clutch. I would take the new bike apart and grease all the pivot points. I will only use BelRay grease and BelRay filter oil on.

I personally run an O ring chain they just last a lot longer and Maxima chain Wax.
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Banana_oil
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Banana_oil 11/28/2022 9:10am
11/28/2022 9:10am Edited Date/Time 11/28/2022 9:11am
AH387 wrote:
Not that anyone is necessarily suggesting it but I would never alter your riding style to prolong a bike. Just ride it how you ride, assuming...
Not that anyone is necessarily suggesting it but I would never alter your riding style to prolong a bike. Just ride it how you ride, assuming you aren't bouncing the limiter for no reason. That being said, like mentioned above, just proper maintenance is the best thing. There probably arent many mods to increase life. But modding the bike could decrease life, so be smart. Stick to basic bolt-ons. Buy good oil and keep it changed. Buy a few airfilters so you can always have a clean one handy. Put in a fresh one every ride. Get an airfilter wash plug and use it when you wash the bike. Thats about it. They are good bikes but they do need more attention than a 450, to stay nice.
Richy wrote:
Agreed. In a race engine you spec valves, springs, retainers, stem seals, rod and rod bolts, etc for the RPM you expect to see for peak...
Agreed. In a race engine you spec valves, springs, retainers, stem seals, rod and rod bolts, etc for the RPM you expect to see for peak power and a little headroom and cap it off with a relevant rev limiter.

The rev limiter is specifically there to not let you rev it to the point of resulting damage. Yeah if you sit it on the limiter all day every day it isn't going to help anything and may well increase wear, but it has absolutely been considered by the builder - especially when the builder is a massive Japanese or Austrian OEM who build thousands of engines.

This should go double for hitting the limiter briefly in the air with practically no load on the engine, surely?
No load revving actually give higher rod force at the TDC as the gas force on top of the piston pushing against the centrifugal force of the piston is lower with no load.
Fireblade2k
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Fireblade2k 11/28/2022 12:08pm
11/28/2022 12:08pm
I have an '06 crf450r I bought new and has only ever had one piston change in over 500 hours. I attribute this to clean oil and clean air filter regularly. OEM air filter quality far surpasses anything aftermarket. Use Bel Ray filter oil from the bottle. None of that spray on crap. The bel Ray is nice and thick and sticky. No sand or dust will ever pass through it. Every 5-8 hours, Clean with mineral spirits then dish soap and water and let dry, then re-oil. Work that oil in to every pore and use Bel Ray waterproof grease on the sealing lip. Do this every 5-8 hours of ride time. And never let anything fall into the intake when you remove your filter. Use a flashlight to see and clean out every speck of dirt that may have fallen down there While the filter is out, use one of those intake covers then spray out your airbox with a hose until it's spotless. That way when you go to reinstall your freshly cleaned and oiled filter, you don't accidentally knock dirt into the intake. This combined with a fully synthetic oil change every 5-8 hours, will give you the most longevity of your new bike.

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mtl
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mtl 11/28/2022 12:17pm
11/28/2022 12:17pm
Fireblade2k wrote:
I have an '06 crf450r I bought new and has only ever had one piston change in over 500 hours. I attribute this to clean oil...
I have an '06 crf450r I bought new and has only ever had one piston change in over 500 hours. I attribute this to clean oil and clean air filter regularly. OEM air filter quality far surpasses anything aftermarket. Use Bel Ray filter oil from the bottle. None of that spray on crap. The bel Ray is nice and thick and sticky. No sand or dust will ever pass through it. Every 5-8 hours, Clean with mineral spirits then dish soap and water and let dry, then re-oil. Work that oil in to every pore and use Bel Ray waterproof grease on the sealing lip. Do this every 5-8 hours of ride time. And never let anything fall into the intake when you remove your filter. Use a flashlight to see and clean out every speck of dirt that may have fallen down there While the filter is out, use one of those intake covers then spray out your airbox with a hose until it's spotless. That way when you go to reinstall your freshly cleaned and oiled filter, you don't accidentally knock dirt into the intake. This combined with a fully synthetic oil change every 5-8 hours, will give you the most longevity of your new bike.

That won't work for a 250F.
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Gravel
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Gravel 11/28/2022 12:35pm
11/28/2022 12:35pm Edited Date/Time 11/28/2022 12:37pm
Have the ECU flashed to lower the rev limiter by about 500 RPM. Then take really good care of your air filter and engine oil. Even then, plan on doing a top end at least every 80 hours or so. It’s a small bore race bike after all..
thatswhathappens 11/28/2022 12:48pm
11/28/2022 12:48pm Edited Date/Time 1/3/2023 2:36pm
lumpy790 wrote:
What part of Charlotte are you in Where are you going to be riding? Im down by Rock Hill SC where the cheap gas is. I...
What part of Charlotte are you in Where are you going to be riding? Im down by Rock Hill SC where the cheap gas is.

I agree with you on running EI it is really great coolant. Install an hour meter so you know where you are at. Run high quality Motorcycle oil that can withstand the tortures of a clutch. I would take the new bike apart and grease all the pivot points. I will only use BelRay grease and BelRay filter oil on.

I personally run an O ring chain they just last a lot longer and Maxima chain Wax.

I’m right outside 485. I usually head out to Windy Hill, East Bend, Club sometimes when they do their open house, and NCMP or Birch Creek on the rare occasion where I’m okay with being in the truck for 7 hours round-trip, lol.

Hour meter is going on it immediately, and I’ll be regreasing everything before it hits a track, for sure.

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MotofactioN
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MotofactioN 11/28/2022 1:37pm
11/28/2022 1:37pm
Fireblade2k wrote:
I have an '06 crf450r I bought new and has only ever had one piston change in over 500 hours. I attribute this to clean oil...
I have an '06 crf450r I bought new and has only ever had one piston change in over 500 hours. I attribute this to clean oil and clean air filter regularly. OEM air filter quality far surpasses anything aftermarket. Use Bel Ray filter oil from the bottle. None of that spray on crap. The bel Ray is nice and thick and sticky. No sand or dust will ever pass through it. Every 5-8 hours, Clean with mineral spirits then dish soap and water and let dry, then re-oil. Work that oil in to every pore and use Bel Ray waterproof grease on the sealing lip. Do this every 5-8 hours of ride time. And never let anything fall into the intake when you remove your filter. Use a flashlight to see and clean out every speck of dirt that may have fallen down there While the filter is out, use one of those intake covers then spray out your airbox with a hose until it's spotless. That way when you go to reinstall your freshly cleaned and oiled filter, you don't accidentally knock dirt into the intake. This combined with a fully synthetic oil change every 5-8 hours, will give you the most longevity of your new bike.

As much time as all that takes, id rather just change a piston every 50 hours and be done with it.

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