- Joined
- Dec 3, 2009
- Messages
- 22,406
- Reaction score
- 243
- Location
- Van Nuys Ca.
- My Bike Models
- 1983 Interstate
2018 KLR 650
2018 BMW S1000 RR
- My Bike Logs forum link
- https://classicgoldwings.com/forums/dan-filipi.122/
I decided the customizing forum is more fitting for this subject because this mod is totally custom.
Just got back from my 75 mile test loop of mixed freeway, rolling hills and some twisties and I gotta say I'm really liking this mod.
It pulls nice at low rpm.
No BS I'd say a good 20% increase of low end torque judging by my seat of the pants dyno.
One improvement in particular is when riding on a level road the transition into and climbing a slow rolling hill there's much less need to give it more gas. The torque has improved without a doubt.
Another improvement is in uphill twisties. It always felt a bit "off" in power like it was always hard to be in the right gear when coming out of a turn. With the improved torque it's like the gear ratios have been modified.
Another improvement is easier takeoffs from a stop.
With improved lower end torque there is less lugging.
Anyone considering this mod should also consider my bike is not normal by most comparisons.
1. It's got an '81 engine with '83 gears.
2. The rear wheel is 17", stock '83 companion to the '83 gears runs a 16" wheel.
The gearing plays a huge part I think in the results since mine runs at a lower rpm than even a stock '83 engine and gears because of the 17" wheel.
I would love to hear from someone trying this in a stock '83 and stock '81.
I have no comparison to the other cams but this run I got 7 seconds 0-60.
Not great but not terrible, I suppose not too shabby for a full dress bike.
I could have done better but without a tach I didn't want to risk over rev and the clutch slips a good bit off the line.
Disadvantages so far are no mechanical fuel pump and no tach drive.
The left tappets are noisy, the right are pretty quiet.
I contribute this to a few possibilities, break in one and it's running old valve springs and rockers.
On top of that who knows what all these valves have been through. I'm sure I lapped them once but I think a full on head reconditioning would only improve the overall performance and quiet down the valve train.
Just got back from my 75 mile test loop of mixed freeway, rolling hills and some twisties and I gotta say I'm really liking this mod.
It pulls nice at low rpm.
No BS I'd say a good 20% increase of low end torque judging by my seat of the pants dyno.
One improvement in particular is when riding on a level road the transition into and climbing a slow rolling hill there's much less need to give it more gas. The torque has improved without a doubt.
Another improvement is in uphill twisties. It always felt a bit "off" in power like it was always hard to be in the right gear when coming out of a turn. With the improved torque it's like the gear ratios have been modified.
Another improvement is easier takeoffs from a stop.
With improved lower end torque there is less lugging.
Anyone considering this mod should also consider my bike is not normal by most comparisons.
1. It's got an '81 engine with '83 gears.
2. The rear wheel is 17", stock '83 companion to the '83 gears runs a 16" wheel.
The gearing plays a huge part I think in the results since mine runs at a lower rpm than even a stock '83 engine and gears because of the 17" wheel.
I would love to hear from someone trying this in a stock '83 and stock '81.
I have no comparison to the other cams but this run I got 7 seconds 0-60.
Not great but not terrible, I suppose not too shabby for a full dress bike.
I could have done better but without a tach I didn't want to risk over rev and the clutch slips a good bit off the line.
Disadvantages so far are no mechanical fuel pump and no tach drive.
The left tappets are noisy, the right are pretty quiet.
I contribute this to a few possibilities, break in one and it's running old valve springs and rockers.
On top of that who knows what all these valves have been through. I'm sure I lapped them once but I think a full on head reconditioning would only improve the overall performance and quiet down the valve train.