470 engine ... 380 kit?

Husaberg

Help Support Husaberg:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
K

Kayeffess

Joined
Aug 30, 2011
Messages
916
Location
Ontario, Canada
Im looking at a frame and parts I have sitting in my shop. I have a running plated 650 but I'm thinking of something smaller using the spare frame and parts. I have everything to build another 650. I'm considering purchasing cases and parts to build the extra 650 into something smaller. I was thinking about a 470 but then after doing some research it seems the 470 and the 450 share the same liner... Does this mean that a 380 kit would fit in the 470 cases and work with the 470 crank and rod! Or would I need to get a shorter rod or the piston skimmed?
I'm just pondering options at this point for a less powerful trail bike. Love the handling, just need a few less ponies.

Thanks
 
the 400 (92mm) and 470 share the same rod. the 400 has an 18mm LE. but there is a 400 piston that can run out of the 20mm LE as long as it hasn't gone which they normally are!

the 470 crank is slightly larger on the flywheel and has a double bearing in the balancer which is also broader at 3 and 9 o clock.

the 470 has a very large combustion chamber so you could do with either a dome on the piston or a smaller 400 head.

the 380 piston (92mm) (I have an OEM here) is very high domed and will giver you the right compression.

otherwise you are just about there? different HG and ignition module of course?

rocker cover must stay with the head so don't just swop a head - swop both. they have different rockers in the top cover.

regards

Taffy
 
Hmmm. So it seems, that really the only parts from my 650 that would work would be trany, clutch side and stator. I was hoping the head and rockers would be usable.
I thought I found a 380 kit for under 400 but it was unavailable when I inquired.
 
you can use the BV head sure. but the comp will be badly down. that is why you need the 380 piston (which as i said - I have one here) which has a monstrous dome on it.

also the 2001-2002 650 had the 53 cam which will really pep it up.

go for it - you only need a piston. try and get their weights close.

regards

Taffy
 
the piston complete is 162.
HG is 11.
your little end is 20mm so that is OK.
the 470 inlest are 37mm and not the intended 35s but you will be OK.
53 cam exchange with your 08 cam at 20.

then you want to get the later decomp and my modified spring
cam chain
DVSK?
sealed cam bearings while you're there
later cam chain tensioner blade

get the valve seats cut and the valves faced.

sweet!!!

regards

Taffy
 
Well, it looks like I'm going to move forward with this. I imagine it will be a slow process as I'll have to start putting parts together. I've found myself a mint 380 liner and new piston. It will either be a 450 or 470 built to 380. But I'm leaning towards a 470 as I have a lot of 01/02 stuff and the 470 parts seem to be more reasonably priced. Looking for cases/crank.
 
I've got them. mind you, last time I said that I sent a set to Portugal without looking and it had a crack around the swing arm pin hole! I'd better look closer!

Taffy

PM me.
 
Things are coming together quicker that i imagined they would. The 92mm liner and piston arrived. Ive found a complete 470 engine thanks to the generosity of a member here on the board. Wow, this forum just keeps getting better and better.

I'm looking at the piston and the valve cut outs wondering if this will indeed work with my big valve head?

image_zps0f408182.jpg
[/URL][/IMG]
 
Last edited:
Also arrived ... A set of brand new, never used 03 650 cases with all factory bearing in place.

image_zps6f163e55.jpg
[/URL][/IMG]

 
Got the big valve head off the 650 back from the machine shop. Seats and valves done. I still need to replace the guide seals. I'm planning on using this head on the 470/400
image_zps0d11aff7.jpg


image_zpsd643c3de.jpg
 
Last edited:
This arrived today

image_zpsrx783aej.jpg


It is actually the 470 out of Jsons old bike. Mostly complete.... It is missing a cam, cam chain and timing chain tensioner.

:):):). I checked the cases in the swingarm areas ....no cracks.

Now to tear down my first Berg engine
 
Both the 650 head and the 470 head are 37/30 valves.
Engine is stripped to the cases now. I guess I need to check crank float before I go any further. I'll try to figure that out this week. I've read about it, just need to do it... Ill try both the vernier and the dial indicator method.
 
the end fload is critical for our engines, the mains seems to like the 0.6mm better. Mine has 100h and looks great! Where did you find those 37mm inlet valves?
 
Valves were in both engines ...I just had them touched and the seats cut at a local engine machine shop
I think taffmeisters in the uk has them.
Thanks for the info.
 
Last edited:
I measured .45mm crank float with the vernier method on the clutch side. I need to find a flywheel puller or someone to do it. Are ktm's the same thread? I'm thinking about running it out to the ktm dealer, 1 hr away ... The guy who used to sell bergs is 2.5 hrs away.
 
0.45 for the smaller engines is fine. also, are you running ball or roller mains? ball don't need anymore than free running (zero) to 0.1mm

Taffy
 
Last edited:
I can't tell you at this point which main are in it. I'm still looking locally for someone who has a puller for the flywheel. I'm going to assume at this point that they are the original bearings.
 
you can flick the mains oil seals out BUT you can wreck them doing it too!

perhaps best to wait till you have the puller!

regards

Taffy
 

Similar threads

S
2004 650 engine rebuild questions
Replies
8
Views
380
Samuel42
S
T
570 engine rebuild help!
Replies
5
Views
526
TurboYoda
T
D
For Sale Parting out my 2001 FE650e
Replies
6
Views
566
Danger666
D
A
FS570 wire looming part missing?
Replies
4
Views
558
eeazye
E
F
550 frame and a 650 engine
Replies
4
Views
816
Abominable
A

Register CTA

Register on Husaberg Forum! This sidebar will go away, and you will see fewer ads.

Recent Discussions

Recent Discussions

Back
Top