Posts
33
Joined
7/15/2019
Location
AU
Hi Guy's
long time Aussie lurker but first post.
I'm 53 years young 6ft 2 and 213 pounds my current ride is a 21 CRF 450 & it is a great bike but it wears me out quickly. I manage to ride MX once a week with friends some A & B grade level. I'm probably upper C grade level and while it is competitive between us none of us race. I had been considering what to do next and the idea of running a 350 with a big bore might be the compromise I may be looking for between manageable power and not wearing me out after a few laps. I am a little undecided due to previously having an 18 KTM350 standard bore and could not come to terms in riding style keeping it in the upper rpms every where. I have read that the big bore shifts the power down to more mid range and adds to the bottom end where for me I felt it needs it.
Can any of you chaps that run one give me some feedback??
Are you happy with it & would you run one again??
What displacement are people running??
I thought I read that Derek Harris on this forum did big bores??
I have a line on a very low hour 22 350 that already has the spring fork conversion done & an Akro system so really its just a matter of dropping the big bore in but I haven't got long to make a decision
Any input would be very much appreciated guy's
Thanks Rob
long time Aussie lurker but first post.
I'm 53 years young 6ft 2 and 213 pounds my current ride is a 21 CRF 450 & it is a great bike but it wears me out quickly. I manage to ride MX once a week with friends some A & B grade level. I'm probably upper C grade level and while it is competitive between us none of us race. I had been considering what to do next and the idea of running a 350 with a big bore might be the compromise I may be looking for between manageable power and not wearing me out after a few laps. I am a little undecided due to previously having an 18 KTM350 standard bore and could not come to terms in riding style keeping it in the upper rpms every where. I have read that the big bore shifts the power down to more mid range and adds to the bottom end where for me I felt it needs it.
Can any of you chaps that run one give me some feedback??
Are you happy with it & would you run one again??
What displacement are people running??
I thought I read that Derek Harris on this forum did big bores??
I have a line on a very low hour 22 350 that already has the spring fork conversion done & an Akro system so really its just a matter of dropping the big bore in but I haven't got long to make a decision
Any input would be very much appreciated guy's
Thanks Rob
but thanks for the response
The Shop
The 350s get a weird rap for being a “vet” bike and that somehow seems to infer that it must be slow. I know a few people who absolutely fly on 350’s and 250s for that matter. If you’re out to have fun I don’t think you can find a better bike. Good luck and let us know what you end up with!
I’ve heard amazing things about them after having Twisted Development do the mapping too.
That and a flywheel weight, should be something you should try with your current 450.
The differences between 3 of my mates same year (2021) YZF450s is astounding, purely from the changes they've made using the Yamaha 'phone apps, and, one of them also fitting a flywheel weight. That one is so easy to ride, yet, it is still '450 fast'
For what it’s worth... I run a lower compression heads on both my 250sx’s, one head is a xc and the other xcw. The power is still very strong, you can twist it more, less rider fatigue, more traction and most probably wouldn’t know the compression is reduced unless I told them.
I’d personally choose a mellow 450 over a 350 every day.
I’m a huge fan of the 350, especially for the vet riders. I feel like I can ride it longer than a 450. It will do anything on a moto track that I feel I have the ability to do and then some. I’ve watched much more talented riders go way faster than me on 350s so I know the bike has more in the tank than I do. It’s not the answer for everyone but it’s what worked for me.
i’m 48, 225 pounds, Vet B and my 350 rips compared to my 20.5 450. the 450 is lethargic everywhere, where the 350 is quick, light, agile, has plenty of power and WAY more fun to ride. I wouldn’t do anything else to it and you will wonder why or how you rode a 450 all those years!
Pit Row
I don't think what you want can be had.
Good luck, this was one of the reasons I stopped riding in the end.
My 390 has the race map and FMF and it's great. I will buy another one if they offer it in their MX line. The 430 and 500 don't make sense for MX, but they could easily offer the 390 in between the 350 and 450 and I think it would be a very popular bike.
https://www.redmotousa.com/product-page/400rx-engine-kit
I might look at the red moto kit and found the us dealer - check point moto.
I know I need to work more on fitness but as most would know when your in your 50's life gets in the way of some of that stuff too.
back to the drawing board I guess.
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