Posts
815
Joined
1/25/2015
Location
Milton, WV
US
Edited Date/Time
1/12/2019 10:54am
Currently I am the test rider/bike for the new Thumper Racing 380 big bore kit. I have just finished 3 days of riding and can give some feedback for those looking for a big bore kit. I will give a list of what is on the bike as well and give you an idea of what did or did not make a difference. I am happy to answer any questions you have.
I was seeking to move some of the HP down to the lower RPM's as I did not want to ride up in the 12,000 RPM's. Thus I did all of these mods in the following order.
2016 KTM 350 SXF
FMF TI full system (saves 3lbs but did not change power much)
Vortex V10 ECU from Tokyo Mods (helped when using the torque maps)
DCR race cams (helped give more of a mid range pull and is noticeable)
High flow air filter
380 Big Bore
52mm Cone Valve forks (Great upgrade)
WP Trax Shock (Great upgrade)
Over sized front rotor
Ride eng steering dampner (Great upgrade)
Ti raptor pegs
Mx 52 tires (120 rear)
Rekluse EXP Core 3.0 Clutch
The 380 big bore has made the most difference so far. The bike can now pull out of the turn even in a higher gear and at lower RPM's than before. If you ride a 350 you know that if your hanging around the 8,000 to 9,000rpm's the bike has little HP in that range for quick hits over a jump faces and turns. Some of use refer to this as lugging it. Now this 380 gives you a very good hit in that lower rpm range. It balances out the bike for me because I tend to stay in the 8 to 10,000 range. The bike still revs and I could not tell a difference but to be honest I do not like to ride up in the 11,000 plus range.
My last bike was a CRF450R (2014) and no the 380 is not a 450. But it is much closer. If gives you enough power but not so much that it works you. The 450 would tire me out and the 380 allows me to ride longer. I did not notice any changes in the handling of the bike. I can say I have enjoyed the change to the bike and this is a change I am very happy with.
Thumper Racing is who provided the kit. But it is not on their site for sale yet so you would need to call if your looking for the 2016/17 380 kit. http://www.thumperracing.net/
I was seeking to move some of the HP down to the lower RPM's as I did not want to ride up in the 12,000 RPM's. Thus I did all of these mods in the following order.
2016 KTM 350 SXF
FMF TI full system (saves 3lbs but did not change power much)
Vortex V10 ECU from Tokyo Mods (helped when using the torque maps)
DCR race cams (helped give more of a mid range pull and is noticeable)
High flow air filter
380 Big Bore
52mm Cone Valve forks (Great upgrade)
WP Trax Shock (Great upgrade)
Over sized front rotor
Ride eng steering dampner (Great upgrade)
Ti raptor pegs
Mx 52 tires (120 rear)
Rekluse EXP Core 3.0 Clutch
The 380 big bore has made the most difference so far. The bike can now pull out of the turn even in a higher gear and at lower RPM's than before. If you ride a 350 you know that if your hanging around the 8,000 to 9,000rpm's the bike has little HP in that range for quick hits over a jump faces and turns. Some of use refer to this as lugging it. Now this 380 gives you a very good hit in that lower rpm range. It balances out the bike for me because I tend to stay in the 8 to 10,000 range. The bike still revs and I could not tell a difference but to be honest I do not like to ride up in the 11,000 plus range.
My last bike was a CRF450R (2014) and no the 380 is not a 450. But it is much closer. If gives you enough power but not so much that it works you. The 450 would tire me out and the 380 allows me to ride longer. I did not notice any changes in the handling of the bike. I can say I have enjoyed the change to the bike and this is a change I am very happy with.
Thumper Racing is who provided the kit. But it is not on their site for sale yet so you would need to call if your looking for the 2016/17 380 kit. http://www.thumperracing.net/
When building the bike keep in mind I did not have the big bore available as this is the first one made. Now if I did this build all over again I would do the big bore, suspension, steering dampner!
The Shop
The reason the 350 is popular with them is because it doesn't make all it's power down low.
It makes just enough.
And you get more if you twist it. It's forgiving where a 450 is a mistake away from fuck me what about my wife and kids.
I so much like my 350 SXF that I went out a bought a 16 350 XCF and set it up for offroad.......very nice bikes.
I have no interest in winning (little white lie, though winning is not everything) - rather I love to ride my dirtcycle and the 350 is the perfect for me.
The big bore kit is something to think about. Moto810 lives near me and I may have to put the arm on him!
64 years young
156 #'s
54 years plus of experience
I put in another ride today on the bike and I am impressed with the big bore kit. I can't say how much the DCR cam help the kit but the kit sure makes it easier to ride the bike. KTM tends to make their engines with more top end than bottom so I am betting many will like this kit even without the DCR cams.
Pit Row
All is good with it. Runs smooth and strong. No issues at all with it. Several others have been running the kit now and no reports of issues from anyone yet. The kit does bridge the gap well for me. I have a 450 also and can say it is not a 450 but it is more fun than the 450. The 380 does not seem to take away any of the handling either. All and all I like it. I would do it again.
Here is the link now for those who were asking before.
http://thumperracing.net/index.php?route=product/product&path=37_39_284…
I was planning on the 17 350sxf but I may hold off on that for now. If I do get one I would get a 380 kit as well.
I have not had good results with DCR cams. They make decent peak hp but that's about it. He also runs his tolerances too tight for my taste. I went with some regrinds that Derek hooked me up with
Cheers
Simon
Post a reply to: 2016 KTM 350 SXF Big Bore (380)