Slash five engine performance parts sources
Posted: Mon Oct 04, 2010 4:15 pm
Well, after 114,000 miles of great motoring (40k mine), my dear 1973 R75/5 is ready for some top end attention.
I pulled it apart and look it over closely with Bob Grauer.
We determined that it needs the heads rebuilt, first over pistons and a cylinder bore. I also will replace my lifters, as a couple are showing some pitting. So that is my basic investment.
But, I cannot help but think about opportunity to do a little more while I am in there. I am not a purist about keeping everything stock. I also love riding this bike. I tend to ride it on the more spirited side. I was recently getting killed on the long uphill runs, by other R75/5’s.
Bob and I started talking about making some modifications. As I understand, you touch one part and you need to do others as well.
Here are the things that we discussed:
1. 336 cam-It sounds like a nice performance upgrade, especially when combined with a higher compression set up. My understanding is that this combination will retain the bottom end torque.
2. High compression pistons-Maybe go up to 800cc
3. Dual plug-sounds like a must for our current fuel options and a high compression motor
4. 36mm Mikuni round slides
I am running an epco stainless exhaust.
I am studying the option of staying stock, versus this path. Do you have any thoughts?
More importantly, do you know a source for these items?
Thanks in advance.
On another note, I will be installing case savers soon. I will document and post back.
I pulled it apart and look it over closely with Bob Grauer.
We determined that it needs the heads rebuilt, first over pistons and a cylinder bore. I also will replace my lifters, as a couple are showing some pitting. So that is my basic investment.
But, I cannot help but think about opportunity to do a little more while I am in there. I am not a purist about keeping everything stock. I also love riding this bike. I tend to ride it on the more spirited side. I was recently getting killed on the long uphill runs, by other R75/5’s.
Bob and I started talking about making some modifications. As I understand, you touch one part and you need to do others as well.
Here are the things that we discussed:
1. 336 cam-It sounds like a nice performance upgrade, especially when combined with a higher compression set up. My understanding is that this combination will retain the bottom end torque.
2. High compression pistons-Maybe go up to 800cc
3. Dual plug-sounds like a must for our current fuel options and a high compression motor
4. 36mm Mikuni round slides
I am running an epco stainless exhaust.
I am studying the option of staying stock, versus this path. Do you have any thoughts?
More importantly, do you know a source for these items?
Thanks in advance.
On another note, I will be installing case savers soon. I will document and post back.