I got my wheels back which was good all trued and tight! I have an appointment on Monday with an engineering shop to skim the rear drum brake before I can mount the new tyres etc.
The project is evolving to suit new information...
Today I raised the engine up twice, it's now sitting 250mm (9.8 inches) off the table/ground at full suspension extension. So when the front suspension compresses to is lower limit the vertical engine ground clearance will be 130mm (5 inches). The crankcase also clears the 45 degree lean angle test at full compression. So I am getting closer to the right engine position. I might still have to move the engine back a little more to make sure I can clear the front header pipe on full compression.... maybe half an inch.
Changes to the original plan..... I was always going to fit two front heads. And I WAS going to have both headers on the RHS of the bike. Which can be done.... but it can not be done well. Simply put, the rear header coming out the right side would have a funky angle that would just look wrong. It was going to be a two into one.
New plan.... front header to the right. The rear forward facing header to the left... with "two into two" high pipes. Look up "Ducati Imola pipes" if you want to get the idea. And now the front intake will exit to the right along with the rear inlet which was always going to the right.
The main idea for the two front heads was to get the headers on the right so I will have to think hard about that idea now....
The next challenge is the chain line. The measurement from the rim center to the inner face of existing Yamaha rear sprocket mount is 70mm..... the measurement from the inner end of the out put shaft is 110 from the motors center line. So I have 40mm (1.5 inches) to work out to get the correct chain line..... I can either move the engine 40mm to the left, or make a new mount for the sprocket on it's carrier that comes out another 40mm (with bearings inside) or a combination of both. With the big primary case it already looks like the engine is too far left! So making a presson and bolt on extension for the sprocket carrier might be the go...... ?
The project is evolving to suit new information...
Today I raised the engine up twice, it's now sitting 250mm (9.8 inches) off the table/ground at full suspension extension. So when the front suspension compresses to is lower limit the vertical engine ground clearance will be 130mm (5 inches). The crankcase also clears the 45 degree lean angle test at full compression. So I am getting closer to the right engine position. I might still have to move the engine back a little more to make sure I can clear the front header pipe on full compression.... maybe half an inch.
Changes to the original plan..... I was always going to fit two front heads. And I WAS going to have both headers on the RHS of the bike. Which can be done.... but it can not be done well. Simply put, the rear header coming out the right side would have a funky angle that would just look wrong. It was going to be a two into one.
New plan.... front header to the right. The rear forward facing header to the left... with "two into two" high pipes. Look up "Ducati Imola pipes" if you want to get the idea. And now the front intake will exit to the right along with the rear inlet which was always going to the right.
The main idea for the two front heads was to get the headers on the right so I will have to think hard about that idea now....
The next challenge is the chain line. The measurement from the rim center to the inner face of existing Yamaha rear sprocket mount is 70mm..... the measurement from the inner end of the out put shaft is 110 from the motors center line. So I have 40mm (1.5 inches) to work out to get the correct chain line..... I can either move the engine 40mm to the left, or make a new mount for the sprocket on it's carrier that comes out another 40mm (with bearings inside) or a combination of both. With the big primary case it already looks like the engine is too far left! So making a presson and bolt on extension for the sprocket carrier might be the go...... ?