Have to relieve the joins in the cases what does this mean (Can you explain with other words so I get it
)(relieve the joins...?)
Thumper Racing 610 kit.
- Thread starter berglsmerg
- Start date
Have to relieve the joins in the cases what does this mean (Can you explain with other words so I get it
)(relieve the joins...?)
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
Its the least I could do
Where the case halves join has a small burr or imperfection, which makes it hard to get the liner in there. Its just a clean up, a light sanding with p600 or a fine half round file.
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
Only if you promise not to laugh at my lack of speed/style/ability, I can go Fast in straight lines, sometimes not even in straight line at low speed (fkn trees)
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
My pleasure Jon, I had fun making it.( the motor and the video) :rock:
G'day berglsmerg glad to hear you re enjoying the thumper racing kit.
I was looking at the 660 kit for the 570 as that will be my next bike.
My 628 puts out 75hp thanks to head work and a end cap mod on the standard muffler, but I still want to see what I can do with the 570
Enjoy, regards, OZTERBERG.
I was looking at the 660 kit for the 570 as that will be my next bike.
My 628 puts out 75hp thanks to head work and a end cap mod on the standard muffler, but I still want to see what I can do with the 570
Enjoy, regards, OZTERBERG.
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
I fitted up the 390 air box today which gives an extra 60mm resonance length and a tidy bell mouth. Using the seat of my pants dyno I can report;
The hole in the bottom end power delivery made by the cam has been bridged, the off idle response is smoother and the wheelie machine has made a return. There could be merit in too short an inlet tract producing a "double charge" when the mixture mass reverts against a closed valve.
It starts easier, f@cked if I know but it does, simple as that.
It sounds TITS !!! Tourist if you think the insistent, metallic, death vader-esque is the business now, well it doesn't menace or imply, it IS evil incarnate dressed in Armani.
The hole in the bottom end power delivery made by the cam has been bridged, the off idle response is smoother and the wheelie machine has made a return. There could be merit in too short an inlet tract producing a "double charge" when the mixture mass reverts against a closed valve.
It starts easier, f@cked if I know but it does, simple as that.
It sounds TITS !!! Tourist if you think the insistent, metallic, death vader-esque is the business now, well it doesn't menace or imply, it IS evil incarnate dressed in Armani.
Good to know that my ***-dyno is not lying to me. I have the same results.I fitted up the 390 air box today which gives an extra 60mm resonance length and a tidy bell mouth. Using the seat of my pants dyno I can report;
The hole in the bottom end power delivery made by the cam has been bridged, the off idle response is smoother and the wheelie machine has made a return. There could be merit in too short an inlet tract producing a "double charge" when the mixture mass reverts against a closed valve.
It starts easier, f@cked if I know but it does, simple as that.
It sounds TITS !!! Tourist if you think the insistent, metallic, death vader-esque is the business now, well it doesn't menace or imply, it IS evil incarnate dressed in Armani.
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
While it may improve off idle performance and mid range, I don't think it helps on top. I had the one I have on my bike on the real dyno not the super high tech *** dyno and found it did not help my top end HP actually hurt it a horse or two. My thought is the velocity stack gets too close to the filter, hurting the ability to get the air into the stack. I have the FX450 boot it too has the velocity stack.
For my application I wish I could find a larger throttle body that was plug and play. Mine is already bored out and I also run a Suzuki injector(more flow):ninja:.
For my application I wish I could find a larger throttle body that was plug and play. Mine is already bored out and I also run a Suzuki injector(more flow):ninja:.
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
That's great info, thanks. For what I do cleaner throttle response off the bottom is better than the wailing top end, but now I have both I can swap at will. Besides Compared to a stock 570 I can afford to loose a little right up top
Joined Aug 2009
1K Posts | 346+
Charters Towers, Australia
Joined Jun 2007
4K Posts | 1K+
south east WA Australia
yes but hondas are gay ok fella? you need the same make throttle body but off a suzuki
I have the feeling my bike still has less torque/ midrange compared to before with stock piston....
Also a lot less smooth throttle response on lower revs maybe this 390 airbox helped just a little now....
My bike is yet to get mapped on dyno but have little time lately...
If I am not happy about result I will probably go back to stock next year (piston).
I also just finished my seathole mod but didn't ride the bike with hole in the seat yet waiting on parts I lost on previous ride
Also a lot less smooth throttle response on lower revs maybe this 390 airbox helped just a little now....
My bike is yet to get mapped on dyno but have little time lately...
If I am not happy about result I will probably go back to stock next year (piston).
I also just finished my seathole mod but didn't ride the bike with hole in the seat yet waiting on parts I lost on previous ride
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