are any of the cylinders nicacyl coated? im hearing they are not why? and can you get it done and reliable?

 

you should know that of course they are

 

it depends on who the builder is. TVI puts a steel sleeve in their jug and their bikes have a good reputation and good durability(103-108mm?). The pami jugs are a custom casting and are nikasil plated( 105-108mm). The largest I've seen a stock jug bored to is 103mm and yes it's nikasil plated.

 

There are a couple other options in the works (I don't think either are shipping yet?)

1. HP Research 105.5 bore - new casting very similar to the Pami but, not your stock jug.
2. Pami is working on a sleeved aluminum cylinder using the stock jug (Similar to what Falicon is doing for the YFZ450 - YFZ 450 Big Bore

 

well i have a chance to get a tvi 720 and was upset about the coating. is it something not to worry about? what else would i have to do to install this kit.

 

TVI has put out some very good and reliable kits. I think the coated has better cooling and may be a little tougher but, there are a lot of people running the TVI set-up with great success.

 

I think you'll find pros and cons with both nikasil plating and steel sleeves, my preference is nikasil, but if you needed it replated it cost more than resleeving, I believe that you have better heat disapation with nikasil but I can't back that up with any data. You'll spend a bunch more for a new HP or pami jug that is nikasiled but maybe cost is not your primary issue. I've heard of sleeves slipping in a jug but haven't actually seen it, the tvi 800 I worked at DS days looked very solidly reinforced and I wouldn't hesitate to go that route if I were in the market. I 'm sure other will share some of their thoughts.

 

will i have to get new studs and modify my head?

 

I would recomend the new studs, my stockers were stretching buy the third time I went into the motor, the HD studs have seen at least 6 retightening cycles and still no probs. Your head would need to be sent to Gary to be opened up around the perimeter to match the new bore size- are you going to put the bigger valves in- ya know thats where his motors get their power from [img]i/expressions/face-icon-small-wink.gif[/img]

 

already have bigger valves. just looking for more poop. and this came up.