Fuel Moto 98" Big Bore Kit
Road Master
Joined: Jan 2024
Posts: 808
Likes: 194
From: Trinidad
This was my feeling. Some guys want the power, and don't mind chasing parts. I get it, its fun. I am just to cheap. I think it would be cool to do a project that was made to handle the power. S&S cases, beefed up tranny, ect
I did a andrews 37 cam, because that was in the in cam 20 years ago, everyone was doing it. I might consider one of the 20 somethings from andrews. I did .030 head gasket on ,y 95 and 98. James makes .035 and cometic does make a .040, which I used on 103"
Again many people disagree with me on compression. But friend of mine, who is indie, said I may have lost money over the years, but these are regular people around here that riding the bike to work.
I did a andrews 37 cam, because that was in the in cam 20 years ago, everyone was doing it. I might consider one of the 20 somethings from andrews. I did .030 head gasket on ,y 95 and 98. James makes .035 and cometic does make a .040, which I used on 103"
Again many people disagree with me on compression. But friend of mine, who is indie, said I may have lost money over the years, but these are regular people around here that riding the bike to work.
Seasoned HDF Member
Joined: Mar 2021
Posts: 18,433
Likes: 3,713
From: backwoods
You may need an after market ignition. Is it required? I don't.. The more you bump compression the more you may need it.
GMR told me to get one, after I bought my build. I dynoed with it, didn't seem to vary much. I ran without it for awhile. I was around 9.7 compression.
GMR told me to get one, after I bought my build. I dynoed with it, didn't seem to vary much. I ran without it for awhile. I was around 9.7 compression.
Road Master
Joined: Jan 2024
Posts: 808
Likes: 194
From: Trinidad
yes you may have to adjust the timing based on the cam or anything that affects the VE and compression of the build.
Thread Starter
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Advanced
Joined: Nov 2021
Posts: 66
Likes: 12
From: New York
much appreciated the knowledge and help on this topic
HDF Community Team
Joined: Jun 2006
Posts: 12,776
Likes: 2,607
From: san antonio
http://www.bigboyzheadporting.com/TwinCamComp.htm
Grand HDF Member
Joined: May 2014
Posts: 3,843
Likes: 1,174
From: florida
ok, guess i'll chime in here.......
there is nothing wrong with doing 95 inch. it leaves room for later over bores if things wear out. if you go right to 97-98, there is no more room and any wear or failure will require replacing the cylinder.
that is my biggest reason for recomending the 95 kit to someone that is NOT looking for an all out performance engine, if you want all out, go as big as you can afford!
compression ratios are an opinion and experience situation to me,,,,,do you travel, do you do your own work, do you have a tech that you like to use? these are all things that I think matter, as the higher the compression goes, yes there is more power, but there is also the need for more expensive, better parts and special tuning requirements.
the Daytona Twin Tec igntion system is a great thing to have when you go above stock compression and I always recomend it.
you can build a mild 95 inch the will be high 90's hp and low 100's torque and be lots of fun to ride and still be reliable and there are lots of guys here that can tell you how to get there. FM, Scott at Hillside and Kirby down in Florida just to name a few. This can be done and have awesome results, without breaking the bank. i know, I've done it.
m
there is nothing wrong with doing 95 inch. it leaves room for later over bores if things wear out. if you go right to 97-98, there is no more room and any wear or failure will require replacing the cylinder.
that is my biggest reason for recomending the 95 kit to someone that is NOT looking for an all out performance engine, if you want all out, go as big as you can afford!
compression ratios are an opinion and experience situation to me,,,,,do you travel, do you do your own work, do you have a tech that you like to use? these are all things that I think matter, as the higher the compression goes, yes there is more power, but there is also the need for more expensive, better parts and special tuning requirements.
the Daytona Twin Tec igntion system is a great thing to have when you go above stock compression and I always recomend it.
you can build a mild 95 inch the will be high 90's hp and low 100's torque and be lots of fun to ride and still be reliable and there are lots of guys here that can tell you how to get there. FM, Scott at Hillside and Kirby down in Florida just to name a few. This can be done and have awesome results, without breaking the bank. i know, I've done it.
m
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Road Master
Joined: Jan 2024
Posts: 808
Likes: 194
From: Trinidad
Do not focus on static compression; it is just a number; CCP is more important. Use the Big Boyz compression calculator to input your motor data and shoot for at least a CCP of 190-195psi.
http://www.bigboyzheadporting.com/TwinCamComp.htm
http://www.bigboyzheadporting.com/TwinCamComp.htm
Road Master
Joined: Jan 2024
Posts: 808
Likes: 194
From: Trinidad
ok, guess i'll chime in here.......
there is nothing wrong with doing 95 inch. it leaves room for later over bores if things wear out. if you go right to 97-98, there is no more room and any wear or failure will require replacing the cylinder.
that is my biggest reason for recomending the 95 kit to someone that is NOT looking for an all out performance engine, if you want all out, go as big as you can afford!
compression ratios are an opinion and experience situation to me,,,,,do you travel, do you do your own work, do you have a tech that you like to use? these are all things that I think matter, as the higher the compression goes, yes there is more power, but there is also the need for more expensive, better parts and special tuning requirements.
the Daytona Twin Tec igntion system is a great thing to have when you go above stock compression and I always recomend it.
you can build a mild 95 inch the will be high 90's hp and low 100's torque and be lots of fun to ride and still be reliable and there are lots of guys here that can tell you how to get there. FM, Scott at Hillside and Kirby down in Florida just to name a few. This can be done and have awesome results, without breaking the bank. i know, I've done it.
m
there is nothing wrong with doing 95 inch. it leaves room for later over bores if things wear out. if you go right to 97-98, there is no more room and any wear or failure will require replacing the cylinder.
that is my biggest reason for recomending the 95 kit to someone that is NOT looking for an all out performance engine, if you want all out, go as big as you can afford!
compression ratios are an opinion and experience situation to me,,,,,do you travel, do you do your own work, do you have a tech that you like to use? these are all things that I think matter, as the higher the compression goes, yes there is more power, but there is also the need for more expensive, better parts and special tuning requirements.
the Daytona Twin Tec igntion system is a great thing to have when you go above stock compression and I always recomend it.
you can build a mild 95 inch the will be high 90's hp and low 100's torque and be lots of fun to ride and still be reliable and there are lots of guys here that can tell you how to get there. FM, Scott at Hillside and Kirby down in Florida just to name a few. This can be done and have awesome results, without breaking the bank. i know, I've done it.
m